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 A320683 #4 Oct 19 2018 10:29:52 %S A320683 0,3,11,35,101,275,669,1486,2970,5474,9514,16071,26652,43301,68207, %T A320683 103901,153339,220576,311048,432343,594218,809436,1093733,1466746, %U A320683 1951992,2577872,3377119,4387788,5652659,7220623,9146776,11494964,14338214,17762174,21865783 %N A320683 Number of 8-element subsets of [n] having a prime element sum. %H A320683 Alois P. Heinz, <a href="/A320683/b320683.txt">Table of n, a(n) for n = 8..500</a> %Y A320683 Column k=8 of A282516. %K A320683 nonn %O A320683 8,2 %A A320683 _Alois P. Heinz_, Oct 19 2018