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A137157
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G.f.: 1 = Sum_{n>=0} a(n)*x^n/(1+x)^(2*2^n).
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4
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1, 2, 5, 24, 239, 4920, 206727, 17568408, 3003763243, 1030272816360, 707851744149198, 973425618916674288, 2678332881795756783639, 14741522294008025924154864, 162290544340043699103996962253, 3573515596966915773419766367302288, 157376160486791180710467411977740266927
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OFFSET
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0,2
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COMMENTS
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Equals unsigned column 1 of triangle A137156.
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LINKS
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PROG
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(PARI) {a(n)=polcoeff(1-sum(k=0, n-1, a(k)*x^k/(1+x+x*O(x^n))^(2^(k+1)) ), 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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EXTENSIONS
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STATUS
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approved
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