A320678 - OEIS

%I #5 Oct 19 2018 10:22:12

%S 0,1,2,6,10,18,26,37,47,62,76,96,116,143,170,205,241,285,329,382,434,

%T 495,555,627,698,781,865,962,1059,1168,1276,1397,1517,1652,1786,1936,

%U 2086,2253,2419,2600,2779,2974,3168,3378,3588,3818,4048,4296,4543,4809,5073

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

%H Alois P. Heinz, <a href="/A320678/b320678.txt">Table of n, a(n) for n = 3..500</a>

%Y Column k=3 of A282516.

%K nonn

%O 3,3

%A _Alois P. Heinz_, Oct 19 2018