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Search: id:A007611
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| A007611 |
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n! + 2^n.
(Formerly M0807)
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+0
1
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| 2, 3, 6, 14, 40, 152, 784, 5168, 40576, 363392, 3629824, 39918848, 479005696, 6227028992, 87178307584, 1307674400768, 20922789953536, 355687428227072, 6402373705990144, 121645100409356288, 2432902008177688576
(list; graph; listen)
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OFFSET
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0,1
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REFERENCES
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51st Annual Putnam Competition, Problem A-1, Math. Mag., 64 (1991), 141-144.
Page 605, Exercise 135 in Calculus of a Single Variable for Advanced High School Students, 8th Edition, by Ron Larson, Robert P. Hostetler and Bruce H. Edwards, 2006.
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LINKS
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Index entries for sequences related to factorial numbers
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FORMULA
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T[n] = (n+4)T[n-1]-4nT[n-2]+(4n-8)T[n-3] with T[0]=2,T[1]=3,T[2]=6 - Dennis S. Kluk (mathemagician(AT)ameritech.net), Feb 12 2006
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CROSSREFS
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Adjacent sequences: A007608 A007609 A007610 this_sequence A007612 A007613 A007614
Sequence in context: A001420 A049339 A081293 this_sequence A098641 A056569 A094468
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KEYWORD
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nonn
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AUTHOR
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njas, Robert G. Wilson v (rgwv(AT)rgwv.com)
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