Or alternatively:
½ n2 + ½ n
or:
½ (n2+n)
a more simple answer is
(n2 ÷ 2)+½ n
e.g:- 10x10=100
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2=50+5=55
The nth triangular number is 0.5*n*(n+1)
The Nth term formula for oblong numbers is N = N(N+1)
It is T/2 * (t+1)
t(n) = n*(n+1)/2
The nth term of the sequence is expressed by the formula 8n - 4.
The nth triangular number is 0.5*n*(n+1)
The Nth term formula for oblong numbers is N = N(N+1)
It is T/2 * (t+1)
it is 6n
The Nth triangular number is calculated by: N(N + 1) -------- 2 Hope this is useful!
There is no formula for prime numbers. They form a random sequence.
There is no such formula. Rectangular numbers are composite numbers and there is no known formula that will generate either composite numbers or prime numbers.
the first 4 terms of the sequence which has the nth term is a sequence of numbers that that goe together eg. 8,12,16,20,24 the nth term would be 4n+4
The sum of the first n cubed numbers is the square of the nth triangular number.
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.
0.5n(n+1)
No, it will be a formula, because "the nth term" means that you have not defined exactly which term it is. So, you make a formula which works for ANY term in the sequence.