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A172402
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G.f.: 1/(1-x) = Sum_{n>=0} a(n)*x^n/(1+x)^(2^(n+1)-2).
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3
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1, 1, 3, 16, 166, 3464, 146167, 12437880, 2127406440, 729774938584, 501412103054958, 689540993399039000, 1897244652767973627366, 10442429807446111573892528, 114961543001288361817819197405
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OFFSET
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0,3
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LINKS
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FORMULA
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EXAMPLE
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1/(1-x) = 1 + x/(1+x)^2 + 3*x^2/(1+x)^6 + 16*x^3/(1+x)^14 + 166*x^4/(1+x)^30 +...
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PROG
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(PARI) {a(n)=if(n==0, 1, polcoeff(-(1-x)*sum(m=0, n-1, a(m)*x^m/(1+x +x*O(x^n))^(2^(m+1)-2)), 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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