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A024588 a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n+1-k), where k = [ (n+1)/2 ], s = (composite numbers). 0
16, 24, 68, 84, 158, 180, 289, 330, 474, 534, 735, 810, 1072, 1158, 1474, 1586, 1958, 2093, 2543, 2697, 3238, 3403, 4013, 4208, 4896, 5128, 5918, 6164, 7046, 7337, 8311, 8645, 9717, 10097, 11269, 11691, 12996, 13443, 14891, 15352, 16909, 17422, 19104, 19674, 21478 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..45.

CROSSREFS

Cf. A002808 (composite numbers).

Sequence in context: A162819 A029720 A204696 * A334229 A335296 A120468

Adjacent sequences:  A024585 A024586 A024587 * A024589 A024590 A024591

KEYWORD

nonn

AUTHOR

Clark Kimberling

EXTENSIONS

a(26) corrected by Sean A. Irvine, Jul 17 2019

STATUS

approved

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Last modified January 16 22:12 EST 2022. Contains 350376 sequences. (Running on oeis4.)