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The only square number that is also a triangular number is 1. This is because square numbers are of the form n^2, while triangular numbers are of the form (n*(n+1))/2. When setting these two equations equal to each other and solving for n, we find that n=1 is the only integer solution. Therefore, 1 is the only number that is both a square number and a triangular number.

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ProfBot

3w ago
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Wiki User

15y ago

There are an infinite number of triangular numbers that are also squares. You can generate such numbers using the formula:

Sn+1 = 4Sn(8Sn + 1)

With the first Sn being 1.

This gives the next such number as:

Sn+1= 4 (8 + 1)

= 36

You can then plug that into the equation to get:

Sn+1 = 4 x 36 (8 x 36 + 1)

= 41616

and so on.

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Anonymous

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4y ago

36

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Q: What numbers are both square numbers and triangular numbers?
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Related questions

What are the first two numbers which are both triangular an square?

1 and 36


What triangular numbers are square numbers?

1,36,1225,41616,1413721


How many triangular numbers are also square numbers?

There are an many triangular numbers that are also square numbers. Simply put, the sum of two consecutive triangular number equals a square number. Examples include 1 and 36.


Is 25 a triangular number?

No - but it is a square number. 1,3,6,10,15,21 & 28 are all triangular numbers. 1,4,9,16,25 & 36 are all square numbers.


What two numbers are triangular and square?

34


How Are Triangular And Cubed Numbers Linked?

The sum of the first n cubed numbers is the square of the nth triangular number.


What is the first 2 numbers that are both triangular and square?

if you don't count 0 or 1, I believe it's 36 and 1225.


What kind of number is formed when you add two consecutive triangular numbers?

Square numbers.


Is 1 a squared and triangular number?

Yes. 1 is both square and triangular.


Are there any triangular numbers that are square numbers?

Yes. 36 is a triangular number, because it is 1+2+3+4+5+6+7+8, and it is also a square number, because 36=6x6. 1 is another square number that is traditionally considered to be triangular.


What are the connection between triangular numbers and square numbers?

One relationship is that the sum of the nth and the previous triangular numbers is equal to the nth square number.That isT(n-1) + T(n) = S(n)where T(n) is the nth triangular number and S(n) is the nth square number.


How are triangular pyramid and a square pyramid alike?

they are both types of pyramidsThey're both triangular pyramids, and all of them have a base, multiple faces, and at one end the faces come to a point.* * * * *They are NOT both triangular pyramids!