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Search: id:A023858
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A023858 a(n) = s(1)t(n)+s(2)t(n-1)+...+s(k)t(n+1-k), where k=[ (n+1)/2 ], s = (natural numbers), t is A023531. +0
1
0, 1, 2, 0, 1, 2, 3, 4, 6, 2, 3, 4, 5, 7, 9, 11, 13, 5, 6, 8, 12, 14, 16, 18, 20, 23, 11, 13, 15, 17, 19, 21, 23, 26, 29, 32, 35, 38, 20, 22, 24, 26, 29, 32, 35, 38, 41, 44, 47, 50, 53, 56, 32, 35, 38, 41, 44, 47, 50, 53, 56, 59, 62, 66, 70, 74, 78, 82, 50, 53, 56, 59, 62, 65, 68, 72, 76, 80, 84, 88, 92 (list; graph; listen)
OFFSET

1,3

CROSSREFS

Adjacent sequences: A023855 A023856 A023857 this_sequence A023859 A023860 A023861

Sequence in context: A066628 A135317 A115218 this_sequence A011118 A131644 A115346

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified October 15 09:18 EDT 2008. Contains 145015 sequences.


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