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Search: id:A048470
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| A048470 |
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a(n)=(n+1)(2^(n+1)-n)/2. |
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+0
1
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| 1, 3, 9, 26, 70, 177, 427, 996, 2268, 5075, 11209, 24510, 53170, 114597, 245655, 524168, 1113976, 2359143, 4980565, 10485570, 22019886, 46137113, 96468739, 201326316, 419430100, 872414907, 1811938977, 3758096006, 7784627818
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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a(n)=T(0,n)+T(1,n-1)+...+T(n,0), array T given by A047858.
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FORMULA
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G.f.:(-1+5*x^3-7*x^2+4*x)/((2*x-1)^2*(x-1)^3) [From Maksym Voznyy (voznyy(AT)mail.ru), Aug 13 2009]
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CROSSREFS
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Sequence in context: A035313 A055293 A034531 this_sequence A138237 A121286 A072863
Adjacent sequences: A048467 A048468 A048469 this_sequence A048471 A048472 A048473
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KEYWORD
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nonn
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AUTHOR
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Clark Kimberling (ck6(AT)evansville.edu)
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EXTENSIONS
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Edited by T. D. Noe (noe(AT)sspectra.com), Dec 11 2006
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