A320679 Number of 4-element subsets of [n] having a prime element sum.

0, 2, 4, 11, 21, 34, 53, 82, 118, 171, 241, 332, 444, 582, 741, 931, 1152, 1411, 1712, 2064, 2465, 2930, 3451, 4034, 4683, 5406, 6200, 7085, 8058, 9128, 10301, 11588, 12980, 14498, 16132, 17885, 19758, 21760, 23885, 26159, 28579, 31157, 33901, 36826, 39923

Offset

4,2

Links

Alois P. Heinz, Table of n, a(n) for n = 4..500

Crossrefs

Column k=4 of A282516.

Sequence in context: A349566 A026275 A152597 * A126972 A295947 A018774

Adjacent sequences: A320676 A320677 A320678 * A320680 A320681 A320682

Keyword

nonn

Author

Alois P. Heinz, Oct 19 2018

Status

approved