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Search: id:A098496
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| 1, 1, -1, -3, 0, 5, -2, -6, 18, -28, -9, 232, -949, 2147, 579, -34487, 202078, -680541, 527630, 11789818, -104485820, 520965294, -1270746269, -5790611092, 98629011681, -729706466727, 3269817273787, -2007499839343, -131143854669640, 1558206734632453
(list; graph; listen)
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OFFSET
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0,4
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MATHEMATICA
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T[r_, 1] := 1; T[r_, 2] := -r - 1; T[r_, c_] := -r*T[r, c - 1] - T[r, c - 2]; Table[ Sum[ T[n - i, i], {i, n + 1}], {n, 0, 12}] (from Robert G. Wilson v (rgwv(AT)rgwv.com), May 10 2005)
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CROSSREFS
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Sequence in context: A130054 A007431 A159980 this_sequence A165754 A011293 A088191
Adjacent sequences: A098493 A098494 A098495 this_sequence A098497 A098498 A098499
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KEYWORD
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sign
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AUTHOR
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Ralf Stephan (ralf(AT)ark.in-berlin.de), Sep 12 2004
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), May 10 2005
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