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A091339
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a(n) = a(n-1)*a(n-2) + (n-2); a(1) = 1, a(2) = 2.
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0
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1, 2, 3, 8, 27, 220, 5945, 1307906, 7775501177, 10169624642405370, 79073928376671158546120499, 804152170591192270227367107671577224679640, 63587471141272584754077292003976884470033921630214659882200111940371
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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MATHEMATICA
| a[1] = 1; a[2] = 2; a[n_] := a[n - 1]a[n - 2] + n - 2; Table[ a[n], {n, 13}] (from Robert G. Wilson v Dec 10 2004)
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CROSSREFS
| Sequence in context: A121401 A093858 A080568 * A006277 A186927 A177010
Adjacent sequences: A091336 A091337 A091338 * A091340 A091341 A091342
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KEYWORD
| nonn,easy
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AUTHOR
| Martti V. A. Holopainen (martti.holopainen(AT)pp2.inet.fi), Dec 06 2004
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EXTENSIONS
| More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Dec 10 2004
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