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A024370 a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = A023532, t = (composite numbers). 0
4, 6, 8, 9, 18, 21, 33, 37, 42, 47, 63, 69, 89, 96, 117, 126, 135, 142, 168, 178, 207, 217, 248, 259, 294, 307, 319, 332, 370, 385, 427, 443, 484, 503, 550, 568, 617, 636, 656, 675, 726, 747, 803, 825, 882, 906, 965, 991, 1054, 1079, 1144, 1172, 1201, 1230, 1298, 1324 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..56.

CROSSREFS

Sequence in context: A073540 A123710 A075243 * A121719 A267509 A162738

Adjacent sequences:  A024367 A024368 A024369 * A024371 A024372 A024373

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified May 28 21:37 EDT 2020. Contains 334690 sequences. (Running on oeis4.)