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A336247
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a(n) = (n!)^n * Sum_{k=0..n} 1 / (k!)^n.
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5
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1, 2, 9, 460, 684545, 50547203126, 280807908057046657, 165858480204085842350156792, 13997217669604247492958380810030809089, 218434494471443385260764665498960241287478619115850, 792268399795067334328715213043856435592857850955707257780000000001
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OFFSET
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0,2
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LINKS
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MATHEMATICA
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Table[(n!)^n Sum[1/(k!)^n, {k, 0, n}], {n, 0, 10}]
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PROG
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(PARI) a(n) = (n!)^n * sum(k=0, n, 1/(k!)^n); \\ Michel Marcus, Jul 14 2020
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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