A024884 a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = A023531, t = (composite numbers).

0, 0, 8, 9, 10, 12, 14, 15, 28, 32, 35, 37, 40, 44, 46, 48, 69, 73, 77, 81, 85, 89, 93, 96, 100, 104, 133, 139, 144, 148, 154, 162, 166, 170, 176, 181, 187, 191, 229, 236, 242, 248, 255, 262, 268, 275, 281, 287, 294, 301, 308, 314, 361, 370, 380, 386, 394, 401, 408, 418, 425

Offset

2,3

Links

Table of n, a(n) for n=2..62.

Crossrefs

Sequence in context: A181723 A078893 A050704 * A031009 A120184 A068019

Adjacent sequences: A024881 A024882 A024883 * A024885 A024886 A024887

Keyword

nonn

Author

Clark Kimberling

Status

approved