A320684 Number of 9-element subsets of [n] having a prime element sum.

0, 2, 12, 47, 169, 477, 1169, 2504, 5083, 10060, 19531, 36004, 62654, 103326, 164132, 253914, 386429, 580424, 862419, 1266725, 1839456, 2638409, 3737879, 5226949, 7215039, 9830238, 13228817, 17596011, 23161194, 30200288, 39055376, 50136943, 63946416, 81075682

Offset

9,2

Links

Alois P. Heinz, Table of n, a(n) for n = 9..500

Crossrefs

Column k=9 of A282516.

Sequence in context: A129018 A302447 A319763 * A069946 A176684 A216152

Adjacent sequences: A320681 A320682 A320683 * A320685 A320686 A320687

Keyword

nonn

Author

Alois P. Heinz, Oct 19 2018

Status

approved