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0, 1, 4, 24, 240, 4080, 110880, 4404960, 238452480, 16777393920, 1484592883200, 161180605555200, 21054378333542400, 3256459844769331200, 588451470437627596800, 122827588904844375552000
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,3
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LINKS
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FORMULA
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MAPLE
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a:=n->sum((n+1)!*j!, j=0..n): seq(a(n), n=-1..15); # Zerinvary Lajos, Jan 08 2007
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MATHEMATICA
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Table[n!*Sum[i!, {i, 0, n - 1}], {n, 0, 16}] (* Olivier Gérard, Sep 28 2012 *)
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PROG
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(PARI) { for (n=0, 100, L=sum(k=0, n-1, k!); write("b061640.txt", n " ", L*n!) ) } \\ Harry J. Smith, Jul 25 2009
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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EXTENSIONS
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More terms from Larry Reeves (larryr(AT)acm.org), Jun 19 2001
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STATUS
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approved
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