A025070 a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = A023532, t = (composite numbers).

6, 8, 9, 10, 21, 24, 37, 42, 47, 51, 69, 75, 96, 102, 126, 135, 142, 150, 178, 187, 217, 227, 259, 272, 307, 319, 332, 345, 385, 401, 443, 457, 503, 522, 568, 587, 636, 656, 675, 693, 747, 769, 825, 847, 906, 929, 991, 1016, 1079, 1105, 1172, 1201, 1230, 1256, 1324, 1354

Offset

1,1

Links

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

Crossrefs

Sequence in context: A175821 A074845 A001746 * A123704 A045574 A074284

Adjacent sequences: A025067 A025068 A025069 * A025071 A025072 A025073

Keyword

nonn

Author

Clark Kimberling

Status

approved