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A020956
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Sum of [tau^(n-k)] for k from 1 to infinity.
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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; refs; listen; history; internal format)
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OFFSET
| 1,2
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REFERENCES
| C. Kimberling, Problem 10520 in Amer. Math. Mon. 103 (1996) p. 347.
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FORMULA
| 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
| a(n) = L(n+1) - [n/2] - 1 = sum(k=0, n-1, A014217(k)).
Sequence in context: A164175 A066456 A066342 * A164153 A164152 A164151
Adjacent sequences: A020953 A020954 A020955 * A020957 A020958 A020959
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KEYWORD
| nonn,easy
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AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu)
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EXTENSIONS
| More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Apr 04 2002
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