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Search: id:A075184
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| 3, 50, 675, 8820, 117600, 1632960, 23814000, 365904000, 5927644800, 101189088000, 1818030614400, 34326452160000, 679990671360000, 14108934647808000, 306113492805120000, 6933770723303424000
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Also one half of fourth diagonal of unsigned triangle A048594.
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FORMULA
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a(n)= A075181(n+4, 3)/2 = |A048594(n+4, n+1)|/2, n>=0.
a(n)= -(n+1)!*S1(n+4, n+1)/2 with S1(n, m) := A008275(n, m) (Stirling1).
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CROSSREFS
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Sequence in context: A063893 A034201 A099346 this_sequence A078674 A071094 A062216
Adjacent sequences: A075181 A075182 A075183 this_sequence A075185 A075186 A075187
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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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