A024604 a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (composite numbers), t = (primes).

8, 12, 38, 58, 126, 174, 297, 381, 569, 689, 979, 1167, 1591, 1825, 2372, 2700, 3408, 3814, 4716, 5166, 6274, 6856, 8175, 8811, 10375, 11141, 12989, 13909, 16008, 17042, 19448, 20606, 23335, 24589, 27647, 29133, 32611, 34229, 38139, 39947, 44278, 46356, 51110

Offset

1,1

Links

Table of n, a(n) for n=1..43.

Crossrefs

Sequence in context: A132356 A341781 A282943 * A025103 A307652 A281663

Adjacent sequences: A024601 A024602 A024603 * A024605 A024606 A024607

Keyword

nonn

Author

Clark Kimberling

Status

approved