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 A134590 #13 Jun 03 2019 12:28:54 %S A134590 2,5,63,112,140,315,364,1261,3025260,3730654144,5513566500,28558451740 %N A134590 A modified Heron sequence starting from 2,5. %H A134590 Paul Yiu, K. R. S. Sastry, Shanzhen Gao, <a href="http://www.ams.org/mathscinet-getitem?mr=2521963">Heron sequences and their modifications</a>. %H A134590 Paul Yiu, K. R. S. Sastry and Shanzhen Gao, <a href="http://www.westga.edu/~integers/j16proc/j16proc.pdf">Heron Sequences</a>, presented on the 2007 Integers Conference and INTEGERS - Electronic Journal of Combinatorial Number Theory, Article 16 Volume 9 Supplement (2009). %Y A134590 Cf. A134587, A134588, A134589. %K A134590 nonn,more %O A134590 1,1 %A A134590 _Shanzhen Gao_, Nov 02 2007 %E A134590 a(8)-a(12) from _Rémy Sigrist_, Jun 03 2019