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A023868 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 A023533. 0
1, 0, 0, 1, 2, 3, 4, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 19, 21, 23, 25, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 30, 32 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..85.

CROSSREFS

Sequence in context: A116889 A037847 A037883 * A122275 A197024 A031235

Adjacent sequences:  A023865 A023866 A023867 * A023869 A023870 A023871

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified December 10 13:38 EST 2016. Contains 279004 sequences.