(38G) Fibonacci Numbers

[Gerald H]

You can put the formula in the Sequence Aplet using the programme FIBOSEQ.

U2 gives the partial sums of the Fibonacci series.

FIBOSEQ

RUN SEQSET:
RECURSE(U,ROUND(((1+√5)/2)^N/√5,0)-(N>55)-(N>57)*2-(N>58)*2,1,1)►U1(N):
CHECK 1:
RECURSE(U,U1(N+2)-1,1,2)►U2(N):
CHECK 2: