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 A324426 a(n) = Product_{i=1..n, j=1..n} (i^3 + j^3). 7
 2, 2592, 134425267200, 3120795915109442519040000, 180825857777547616919759624941086965760000000, 99356698720512072045648926659510730227553351200000695922065408000000000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS FORMULA a(n) ~ A * 2^(2*n*(n+1) + 1/4) * exp(Pi*(n*(n+1) + 1/6)/sqrt(3) - 9*n^2/2 - 1/12) * n^(3*n^2 - 3/4) / (3^(5/6) * Pi^(1/6) * Gamma(2/3)^2), where A is the Glaisher-Kinkelin constant A074962. MATHEMATICA Table[Product[i^3+j^3, {i, 1, n}, {j, 1, n}], {n, 1, 10}] PROG (PARI) a(n) = prod(i=1, n, prod(j=1, n, i^3+j^3)); \\ Michel Marcus, Feb 27 2019 CROSSREFS Cf. A079478, A307210, A324403, A324437, A324438, A324439, A324440. Sequence in context: A281692 A225221 A347654 * A114067 A109119 A002495 Adjacent sequences:  A324423 A324424 A324425 * A324427 A324428 A324429 KEYWORD nonn AUTHOR Vaclav Kotesovec, Feb 27 2019 STATUS approved

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Last modified December 9 02:53 EST 2021. Contains 349625 sequences. (Running on oeis4.)