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Search: id:A091032
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| A091032 |
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Second column (k=3) of array A090438 ((4,2)-Stirling2) divided by 8. |
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+0
2
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| 1, 60, 5040, 604800, 99792000, 21794572800, 6102480384000, 2134124568576000, 912338253066240000, 468333636574003200000, 284372184127734743040000, 201645730563302817792000000, 165147853331345007771648000000
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OFFSET
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2,2
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FORMULA
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a(n)= A090438(n, 3)/8 = (n-1)*(2*n)!/4!
E.g.f.: (-3*hypergeom([1/2, 1], [], 4*x) + hypergeom([1, 3/2], [], 4*x) + 2)/(8*3!) (cf. A090438).
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CROSSREFS
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Cf. A002674 (first column of A090438), A091033 (third column).
Sequence in context: A166772 A074076 A084274 this_sequence A091753 A130214 A146498
Adjacent sequences: A091029 A091030 A091031 this_sequence A091033 A091034 A091035
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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), Jan 23 2004
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