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Search: id:A075183
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| 1, 11, 105, 1020, 10500, 115920, 1375920, 17539200, 239500800, 3492720000, 54226972800, 893577484800, 15583119552000, 286816578048000, 5557616064000000, 113108602134528000, 2412627824775168000
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Also one half of third diagonal of triangle A048594.
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FORMULA
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a(n)= A075181(n+3, 2)/2 = A048594(n+3, n+1)/2, n>=0.
a(n)= (n+1)!*S1(n+3, n+1)/2 with S1(n, m) := A008275(n, m) (Stirling1).
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CROSSREFS
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Sequence in context: A158470 A163933 A099839 this_sequence A116011 A058715 A140617
Adjacent sequences: A075180 A075181 A075182 this_sequence A075184 A075185 A075186
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KEYWORD
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nonn,easy
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AUTHOR
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Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de), Sep 19, 2002
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