A320684 - OEIS

%I #4 Oct 19 2018 10:30:58

%S 0,2,12,47,169,477,1169,2504,5083,10060,19531,36004,62654,103326,

%T 164132,253914,386429,580424,862419,1266725,1839456,2638409,3737879,

%U 5226949,7215039,9830238,13228817,17596011,23161194,30200288,39055376,50136943,63946416,81075682

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

%H Alois P. Heinz, <a href="/A320684/b320684.txt">Table of n, a(n) for n = 9..500</a>

%Y Column k=9 of A282516.

%K nonn

%O 9,2

%A _Alois P. Heinz_, Oct 19 2018