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Search: id:A024861
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A024861 a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (natural numbers), t = (F(2), F(3), F(4), ... ). +0
1
2, 3, 11, 18, 44, 71, 147, 238, 450, 728, 1304, 2110, 3652, 5909, 10001, 16182, 26984, 43661, 72085, 116636, 191284, 309504, 505312, 817612, 1330854, 2153367, 3498039, 5659946, 9181940 (list; graph; listen)
OFFSET

2,1

FORMULA

G.f.:(-2-x^4-2*x^3-2*x^2-x)/((x^2+x-1)*(x^4+x^2-1)^2) [From Maksym Voznyy (voznyy(AT)mail.ru), Jul 27 2009]

CROSSREFS

Sequence in context: A051090 A061400 A090474 this_sequence A025101 A025105 A095984

Adjacent sequences: A024858 A024859 A024860 this_sequence A024862 A024863 A024864

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

page 1

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.


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