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Search: id:A020956
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| A020956 |
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Sum of [tau^(n-k)] for k from 1 to infinity. |
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+0
2
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| 1, 2, 4, 8, 14, 25, 42, 71, 117, 193, 315, 514, 835, 1356, 2198, 3562, 5768, 9339, 15116, 24465, 39591, 64067, 103669, 167748, 271429, 439190, 710632, 1149836, 1860482, 3010333, 4870830, 7881179, 12752025, 20633221, 33385263, 54018502
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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C. Kimberling, Problem 10520 in Amer. Math. Mon. 103 (1996) p. 347.
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FORMULA
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G.f.: [x(1-x^2+x^3)]/[(1-x-x^2)(1+x)(1-x)^2]. - R. Stephan, Apr 08 2004.
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CROSSREFS
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a(n) = L(n+1) - [n/2] - 1 = sum(k=0, n-1, A014217(k)).
Adjacent sequences: A020953 A020954 A020955 this_sequence A020957 A020958 A020959
Sequence in context: A019274 A066456 A066342 this_sequence A065492 A006777 A036609
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KEYWORD
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nonn,easy
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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 Vladeta Jovovic (vladeta(AT)Eunet.yu), Apr 04 2002
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