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 A051738 #14 Sep 21 2017 09:03:16 %S A051738 1,5,30,180,1075,6366,37520,220500,1293615,7581240,44398387,259881960, %T A051738 1520633270,8895116230 %N A051738 Number of rooted 2-dimensional polyominoes with n pentagonal cells, with no symmetries removed. %C A051738 Number of polypents (like polyominoes, with pentagons) with n cells. These are anchored polypents, with no culling for reflection or rotation (or translation) isomorphism. %D A051738 Dan Hoey, Bill Gosper and Richard C. Schroeppel, Discussions in Math-Fun Mailing list, circa Jul 13 1999. %H A051738 R. C. Schroeppel, <a href="http://www.experimentalmath.info/workshop2004/schroeppel-talk.pdf">A few mathematical experiments</a> %Y A051738 A row of A094166. %K A051738 nonn %O A051738 1,2 %A A051738 Richard C. Schroeppel, Feb 13 2002 %E A051738 More terms from _N. J. A. Sloane_, May 06 2004 %E A051738 Edited by _N. J. A. Sloane_, Sep 15 2008 at the suggestion of _R. J. Mathar_