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 A120652 #3 Mar 30 2012 16:50:29 %S A120652 1,1,1,1,1,1,1,2,2,1,2,3,5,2,1,3,8,11,8,3,1,6,16,30,22,13,3,1,10,38, %T A120652 72,74,45,18,4,1,20,80,182,208,164,73,25,4,1,36,180,434,598,527,310, %U A120652 119,32,5,1,72,384,1048,1600,1652,1120,548,172,41,5,1 %N A120652 Triangle read by rows: numbers of isomers of unbranched a-4-catapolypentagons. %D A120652 J. Brunvoll, S. J. Cyvin and B. N. Cyvin, Isomer enumeration of polygonal systems..., J. Molec. Struct. (Theochem), 364 (1996), 1-13. %e A120652 Triangle begins %e A120652 1 %e A120652 1 1 %e A120652 1 1 1 %e A120652 1 2 2 1 %e A120652 2 3 5 2 1 %e A120652 3 8 11 8 3 1 %e A120652 6 16 30 22 13 3 1 %Y A120652 Columns give A002215, A121133-A121136. %K A120652 nonn,tabl %O A120652 0,8 %A A120652 _N. J. A. Sloane_, Aug 18 2006