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Search: id:A024719
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| A024719 |
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a(n) = (1/3)*(2 + sum of C(3k,k)) for k = 0,1,2,...,n. |
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+0
1
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| 1, 2, 7, 35, 200, 1201, 7389, 46149, 291306, 1853581, 11868586, 76380826, 493606726, 3201081874, 20821158234, 135776966762, 887393271311, 5811082966886, 38119865826421, 250447855600321, 1647729357535486
(list; graph; listen)
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OFFSET
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0,2
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MAPLE
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a:=n->(sum((binomial(-j, -3*j)), j=0..n)): seq(a(n), n=0..20); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Oct 03 2007
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CROSSREFS
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Sequence in context: A057298 A058941 A020066 this_sequence A086637 A130458 A003575
Adjacent sequences: A024716 A024717 A024718 this_sequence A024720 A024721 A024722
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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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More terms from James A. Sellers (sellersj(AT)math.psu.edu), May 01 2000
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