A024860 a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (natural numbers), t = (composite numbers).

6, 8, 25, 28, 59, 68, 119, 136, 211, 234, 338, 366, 502, 543, 715, 770, 981, 1042, 1297, 1365, 1667, 1752, 2104, 2208, 2615, 2726, 3191, 3325, 3854, 4013, 4610, 4797, 5466, 5682, 6426, 6654, 7477, 7716, 8620, 8889, 9878, 10181, 11261, 11600, 12774, 13150, 14422

Offset

2,1

Links

Table of n, a(n) for n=2..48.

Crossrefs

Sequence in context: A119875 A053189 A156231 * A025100 A155478 A219191

Adjacent sequences: A024857 A024858 A024859 * A024861 A024862 A024863

Keyword

nonn

Author

Clark Kimberling

Status

approved