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A349874
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Expansion of A(x)^3, where A(x) is g.f. of n^n (A000312).
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1
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1, 3, 15, 106, 990, 11688, 168529, 2886039, 57372984, 1299676869, 33049616319, 931991169660, 28856822050546, 972979199567826, 35480222492288493, 1391109691131953417, 58351612093156552572, 2607190821521732751855, 123613763047459102476027
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OFFSET
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0,2
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LINKS
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Table of n, a(n) for n=0..18.
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FORMULA
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a(n) ~ 3 * n^n.
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MATHEMATICA
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nmax = 20; CoefficientList[Series[(1 + Sum[n^n * x^n, {n, 1, nmax}])^3, {x, 0, nmax}], x]
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CROSSREFS
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Cf. A000312, A053729, A100262.
Sequence in context: A107878 A218688 A120016 * A074519 A105618 A120732
Adjacent sequences: A349871 A349872 A349873 * A349875 A349876 A349877
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KEYWORD
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nonn
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AUTHOR
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Vaclav Kotesovec, Dec 03 2021
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STATUS
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approved
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