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Search: id:A099198
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| 0, 7, 197, 8018, 556014, 59740609, 9174170011, 1904975488436, 513771331467372, 174548332364311563, 72920994844093191553, 36737130036755448717350, 21961934137099746053158010, 15369599839081193169161637861
(list; graph; listen)
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OFFSET
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1,2
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PROGRAM
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(PARI) forstep(n=2, 40, 2, s=0; for(k=3, n, s+=(k-1)!*binomial(n, k)/2); print1(s, ", "))
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CROSSREFS
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Cf. A002807.
Sequence in context: A034835 A041371 A136675 this_sequence A058391 A157388 A068233
Adjacent sequences: A099195 A099196 A099197 this_sequence A099199 A099200 A099201
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KEYWORD
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nonn
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AUTHOR
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Lambert Klasen (Lambert.Klasen(AT)gmx.net), Nov 16 2004
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