This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A320679 #4 Oct 19 2018 10:24:43 %S A320679 0,2,4,11,21,34,53,82,118,171,241,332,444,582,741,931,1152,1411,1712, %T A320679 2064,2465,2930,3451,4034,4683,5406,6200,7085,8058,9128,10301,11588, %U A320679 12980,14498,16132,17885,19758,21760,23885,26159,28579,31157,33901,36826,39923 %N A320679 Number of 4-element subsets of [n] having a prime element sum. %H A320679 Alois P. Heinz, <a href="/A320679/b320679.txt">Table of n, a(n) for n = 4..500</a> %Y A320679 Column k=4 of A282516. %K A320679 nonn %O A320679 4,2 %A A320679 _Alois P. Heinz_, Oct 19 2018