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A171209
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G.f. satisfies: A(x) = (1 + x*A(2x))^7.
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3
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1, 7, 119, 3955, 247093, 29355725, 6770018269, 3075928905505, 2774997766597238, 4989660046676105752, 17913062958150482828608, 128508635121001835101510976, 1843071985575998120371392747776
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OFFSET
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0,2
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LINKS
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FORMULA
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Self-convolution 7th power of A171208 where a(n) = A171208(n+1)/2^n for n>=0.
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PROG
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(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)}
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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