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A270597
E.g.f.: 1/(1-x) * Product_{k>0} (1 + sinh(x^k/k)).
6
1, 2, 5, 21, 98, 575, 3979, 31304, 277248, 2739141, 29898743, 355083014, 4584190984, 63680965127, 949202526375, 15102175351080, 255427113948896, 4573909845546233, 86542053988578763, 1723504067599805402, 36054646740337797072, 790412592781303448523
OFFSET
0,2
LINKS
FORMULA
a(n) ~ n * A130263(n).
MATHEMATICA
nn=25; Range[0, nn]!*CoefficientList[Series[1/(1-x)*Product[1+Sinh[x^k/k], {k, 1, nn}], {x, 0, nn}], x]
CROSSREFS
KEYWORD
nonn
AUTHOR
Vaclav Kotesovec, Mar 20 2016
STATUS
approved