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 A247118 #9 Feb 07 2017 10:39:34 %S A247118 1,0,0,0,0,10,0,0,0,0,350,0,0,0,296,8954,50,0,0,13516,242820,2760,0, %T A247118 5832,602980,6591140,126088,496,442978,22506998,179340480,4843754, %U A247118 147924,24885442,789989882,4891089138,172488058,13913138,1184576462,26387065880 %N A247118 Number of tilings of a 10 X n rectangle using 2n pentominoes of shape Y. %H A247118 Alois P. Heinz, <a href="/A247118/b247118.txt">Table of n, a(n) for n = 0..100</a> %H A247118 Wikipedia, <a href="https://en.wikipedia.org/wiki/Pentomino">Pentomino</a> %Y A247118 Cf. A174249, A233427. %K A247118 nonn %O A247118 0,6 %A A247118 _Alois P. Heinz_, Nov 19 2014