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 A269414 #12 Feb 27 2016 05:17:26 %S A269414 3,19,31,83,109,199,251,409,571,631,683,829,1091,1489,1999,2341,2531, %T A269414 2971,3529,4621,4789,5051,7039,7211,7669,8779,9721,10459,10711,11171, %U A269414 13681,14851,15131,16069,16381,16883,17659,18731,20011,20359,21683,23251,24851 %N A269414 Prime numbers that are the sum of one or more consecutive triangular numbers. %H A269414 Vaclav Kotesovec and Chai Wah Wu, <a href="/A269414/b269414.txt">Table of n, a(n) for n = 1..5000</a> (terms 1..100 from Vaclav Kotesovec) %Y A269414 Cf. A257974, A000217, A125602, A034706. %K A269414 nonn %O A269414 1,1 %A A269414 _Vaclav Kotesovec_, Feb 25 2016