A320678 Number of 3-element subsets of [n] having a prime element sum.

0, 1, 2, 6, 10, 18, 26, 37, 47, 62, 76, 96, 116, 143, 170, 205, 241, 285, 329, 382, 434, 495, 555, 627, 698, 781, 865, 962, 1059, 1168, 1276, 1397, 1517, 1652, 1786, 1936, 2086, 2253, 2419, 2600, 2779, 2974, 3168, 3378, 3588, 3818, 4048, 4296, 4543, 4809, 5073

Offset: 3

Author

Alois P. Heinz, Oct 19 2018

Keywords

• nonn

Links

• Alois P. Heinz, Table of n, a(n) for n = 3..500

Crossrefs

Column k=3 of A282516.