(38G) Tribonacci Sequence

[Gerald H]

The programme below inserts symbolics in the Sequence aplet to produce the Tribonacci sequence.

For info on the sequence see:

https://oeis.org/A000073

Code:


RECURSE(U,U2(N-2),0,0)►U1(N):
CHECK 1:
RECURSE(U,U2(N-1)+U1(N)+U1(N-1),1,1)►U2(N):

[Gerald H]

If you want the sequence quick & dirty this programme

Code:


RECURSE(U,ROUND(3*1.83928675521^(N-1)/16.4110613799,0),0,0)►U1(N):
CHECK 1:

starts to err at N = 41.