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Search: id:A124464
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| 1, 5, 19, 73, 302, 1325, 6032, 28193, 134825, 659011, 3290110, 16764206, 87103106, 461090076, 2484768459, 13621130998, 75906831145, 429768775851, 2470872560536, 14418770507660, 85367306874021, 512604419523512
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OFFSET
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0,2
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FORMULA
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G.f.: A(x) = Sum_{n>=0} x^n*R_n(x)^4, where R_n(x) is the g.f. of row n in table A124460 and satisfies: R_n(x) = Sum_{k>=0} x^k * R_k(x)^n for n>=0.
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PROGRAM
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(PARI) {a(n)=local(m=max(n, 4), R=vector(m+1, r, vector(m+1, c, binomial(r+c-2, c-1)))); for(i=0, m, for(r=0, m, R[r+1]=Vec(sum(c=0, m, x^c*Ser(R[c+1])^r+O(x^(m+1)))))); R[5][n+1]}
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CROSSREFS
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Cf. A124460 (table); other rows: A124461, A124462, A124463, A124465, A124466.
Adjacent sequences: A124461 A124462 A124463 this_sequence A124465 A124466 A124467
Sequence in context: A047155 A034548 A129166 this_sequence A098913 A126392 A108981
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KEYWORD
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nonn
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AUTHOR
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Paul D. Hanna (pauldhanna(AT)juno.com), Nov 03 2006
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