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A218032 G.f. A(x) satisfies A(x) = 1 + x / (1 - x * A(x^2)). 3
1, 1, 1, 1, 2, 3, 5, 8, 13, 21, 35, 57, 94, 154, 254, 417, 687, 1129, 1859, 3057, 5032, 8277, 13623, 22412, 36883, 60684, 99862, 164312, 270384, 444899, 732093, 1204629, 1982228, 3261701, 5367131, 8831505, 14532200, 23912499, 39347839, 64746320, 106539481, 175309363, 288469809 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,5
COMMENTS
What does this sequence count?
LINKS
PROG
(PARI)
N=66; R=O('x^N); x='x+R;
F = 1 + x;
for (k=1, N+1, F = 1 + x / (1 - x * subst(F, 'x, 'x^2) ) + R; );
Vec(F)
CROSSREFS
Sequence in context: A321656 A005170 A226999 * A229194 A304790 A306486
KEYWORD
nonn
AUTHOR
Joerg Arndt, Oct 19 2012
STATUS
approved

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)