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 A171209 G.f. satisfies: A(x) = (1 + x*A(2x))^7. 3
 1, 7, 119, 3955, 247093, 29355725, 6770018269, 3075928905505, 2774997766597238, 4989660046676105752, 17913062958150482828608, 128508635121001835101510976, 1843071985575998120371392747776 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Table of n, a(n) for n=0..12. FORMULA Self-convolution 7th power of A171208 where a(n) = A171208(n+1)/2^n for n>=0. PROG (PARI) {a(n)=local(A=1+x+x*O(x^n)); for(i=0, n, A=(1+x*subst(A, x, 2*x))^7); polcoeff(A, n)} CROSSREFS Cf. A135868, A171200-A171207, A171208, A171210-A171211. Sequence in context: A113667 A357351 A192565 * A296731 A092612 A263943 Adjacent sequences: A171206 A171207 A171208 * A171210 A171211 A171212 KEYWORD nonn AUTHOR Paul D. Hanna, Dec 05 2009 STATUS approved

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Last modified December 3 05:03 EST 2023. Contains 367531 sequences. (Running on oeis4.)