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A171197 G.f. satisfies: A(x) = 1/(1 - x*A(2x)^7). 2
1, 1, 15, 533, 36415, 4624621, 1108685495, 513716588981, 467874135168079, 845152554936920445, 3041003426951554000167, 21840734269889733272106629, 313415404907854466274076819391, 8990640466019774671530066108827853 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..13.

PROG

(PARI) {a(n)=local(A=1+x+x*O(x^n)); for(i=0, n, A=1/(1-x*subst(A, x, 2*x)^7) ); polcoeff(A, n)}

CROSSREFS

Cf. A015083, A171192-A171196, A171198.

Sequence in context: A074040 A002403 A077206 * A061174 A255956 A115918

Adjacent sequences:  A171194 A171195 A171196 * A171198 A171199 A171200

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Dec 05 2009

STATUS

approved

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Last modified August 6 00:46 EDT 2021. Contains 346493 sequences. (Running on oeis4.)