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 A320678 #5 Oct 19 2018 10:22:12 %S A320678 0,1,2,6,10,18,26,37,47,62,76,96,116,143,170,205,241,285,329,382,434, %T A320678 495,555,627,698,781,865,962,1059,1168,1276,1397,1517,1652,1786,1936, %U A320678 2086,2253,2419,2600,2779,2974,3168,3378,3588,3818,4048,4296,4543,4809,5073 %N A320678 Number of 3-element subsets of [n] having a prime element sum. %H A320678 Alois P. Heinz, <a href="/A320678/b320678.txt">Table of n, a(n) for n = 3..500</a> %Y A320678 Column k=3 of A282516. %K A320678 nonn %O A320678 3,3 %A A320678 _Alois P. Heinz_, Oct 19 2018