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Search: id:A091755
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| A091755 |
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Sixth column (m=7) of array A091752 ((-1,2)Stirling2) divided by -12. |
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+0
2
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| 1, 140, 27720, 7847840, 3049446400, 1564366003200, 1026108219136000, 838477001922560000, 835580445006827520000, 997744946185930342400000, 1406513375677181496524800000, 2311431202054422682730496000000
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OFFSET
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4,2
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FORMULA
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a(n)= -A091752(n, 7)/12, n>=4.
a(n)= (3/(4*5!))*n*(n-3)*(3*(n-2))!/((3^(n-2))*(n-2)!) = 3*n*(n-3)* A052502(n-2)/(4*5!), n>=4.
G.f.: (x^4)*hypergeom([7/3, 8/3, 5, 2], [4], 9*x).
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CROSSREFS
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Sequence in context: A075915 A159362 A159366 this_sequence A058939 A165600 A137506
Adjacent sequences: A091752 A091753 A091754 this_sequence A091756 A091757 A091758
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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_DOT_uni-karlsruhe_DOT_de), Feb 27 2004
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