To get the next term, add the sum of all previous terms
to the most recent term.
5-8-13-21-34-56-90.... The next number is the sum of the two previous numbers. This is the Fibonacci sequence, 1-1-2-3-5-8-13-21-34-56-90 etc
89.
Add the previous 2 numbers to get the next number.
If you mean: 1 1 2 3 5 8 13 21 then the next number is 13+21 = 34
One possible rule is: Un = (243n5 - 4210n4 + 27225n3 - 60830n2 + 106452n - 45960)/120 for n = 1, 2, 3, etc
One possible rule is: Un = (219n5 - 3755n4 + 24075n3 - 70645n2 + 92166n - 36960)/120 for n = 1, 2, 3, etc
5-8-13-21-34-56-90.... The next number is the sum of the two previous numbers. This is the Fibonacci sequence, 1-1-2-3-5-8-13-21-34-56-90 etc
44
89.
Add the previous 2 numbers to get the next number.
If you mean: 1 1 2 3 5 8 13 21 then the next number is 13+21 = 34
One possible rule is: Un = (243n5 - 4210n4 + 27225n3 - 60830n2 + 106452n - 45960)/120 for n = 1, 2, 3, etc
55 and 89
34 55 89 etc..
The rule for this sequence appears to be adding consecutive prime numbers. The sequence starts with 3, then adds the next prime number 2 to get 4. It then adds 3 (the next prime number) to 4 to get 7, then 5 to 7 to get 12, and so on. Each number in the sequence is the sum of the previous number and the next prime number in order.
0, 1, 1 (0+1), 2 (1+1), 3 (2+1), 5 (2+3), 8 (3+5), 13(5+8), 21 (13+8), 34 (21+13),....and so on.
This is the famous fibonacci sequence, where each term in the sequence is the sum of the previous two. Fn=Fn-1 + Fn-2 F0 = 1 and F1 = 1 are the initial values to begin the sequence. F2 = F1 + F0 = 1 + 1 = 2 F3 = F2 + F1 = 2 + 1 = 3 and so on