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1, 1, 2, 5, 11, 143, 1847, 24127, 2101931, 96398196, 9362963203, 3376252046640, 551993132054154, 434634824535802596, 528116646162507517308, 372831439174848001477184, 2029862948426766042724907818
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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MATHEMATICA
| t[n_, m_] = (n^2 - 2*n*m + m^2)!/((m^2)!(n^2 - 2*n*m)!); a = Table[Sum[t[n, m], {m, 0, n}], {n, 0, 20}]
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CROSSREFS
| Sequence in context: A078790 A158999 A069506 * A098438 A064772 A107989
Adjacent sequences: A123162 A123163 A123164 * A123166 A123167 A123168
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KEYWORD
| nonn
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AUTHOR
| Roger Bagula (rlbagulatftn(AT)yahoo.com), Oct 02 2006
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EXTENSIONS
| Edited by N. J. A. Sloane (njas(AT)research.att.com), Oct 04 2006
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