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).

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

Offset

1,1

Links

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

Crossrefs

Sequence in context: A073540 A123710 A075243 * A367176 A121719 A267509

Adjacent sequences: A024367 A024368 A024369 * A024371 A024372 A024373

Keyword

nonn

Author

Clark Kimberling

Status

approved