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A258622
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a(1) = 2, a(n+1) = a(n) * (1 + n + a(n))/n.
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0
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2, 8, 44, 704, 124784, 3114359072, 1616538741858202448, 373313929132642872042128187516973184, 17420411210556488056172048238850552742971470265342499948186222078482064
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OFFSET
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1,1
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COMMENTS
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The next term has 139 digits.
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LINKS
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FORMULA
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a(n) ~ n * c^(2^n), where c = 1.36534926036757464312824443040683531215776134381623126072...
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MATHEMATICA
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PROG
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(Maxima) a(n) := if n = 1 then 2 else a(n-1)*(n+a(n-1))/(n-1) $
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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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