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Search: id:A122044
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| A122044 |
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a(n) = a(n - 2) - (n - 3)*a(n - 3). |
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+0
1
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| 0, 1, 2, 1, 1, -3, -2, -7, 13, 5, 62, -99, 17, -719, 1106, -923, 10453, -16407, 24298, -183655, 303217, -621019, 3792662, -6685359, 16834061, -90123923, 170597318, -494141387, 2423695393, -4929671655, 15765512842, -72793142659, 158725990837, -545758527919, 2415313413266
(list; graph; listen)
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OFFSET
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0,3
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MATHEMATICA
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a[0] = 0; a[1] = 1; a[2] = 2; a[n_] := a[n] = a[n - 2] - (n - 3)*a[n - 3] Table[a[n], {n, 0, 30}]
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CROSSREFS
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Cf. A122021.
Sequence in context: A093623 A156025 A035556 this_sequence A120744 A053423 A127514
Adjacent sequences: A122041 A122042 A122043 this_sequence A122045 A122046 A122047
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KEYWORD
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sign,easy
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AUTHOR
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Roger Bagula (rlbagulatftn(AT)yahoo.com), Sep 13 2006
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EXTENSIONS
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Edited by N. J. A. Sloane (njas(AT)research.att.com), Sep 17 2006
More terms from Max Alekseyev, Sep 13 2009
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