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 A251077 #8 Feb 06 2017 18:23:57 %S A251077 1,1,1,1,1,1,1,1,64,167,316,517,776,1099,1492,1961,14428,39956,88103, %T A251077 172509,311816,530678,860861,1342433,4020710,10599604,24896626, %U A251077 53438385,106915866,202198270,365048944,633709553,1392777233,3238633334,7446642085,16454751188 %N A251077 Number of tilings of a 24 X n rectangle using 3n octominoes of shape I. %H A251077 Alois P. Heinz, <a href="/A251077/b251077.txt">Table of n, a(n) for n = 0..200</a> %H A251077 Wikipedia, <a href="https://en.wikipedia.org/wiki/Octomino">Octomino</a> %Y A251077 Column k=8 of A251072. %Y A251077 Cf. A250665. %K A251077 nonn %O A251077 0,9 %A A251077 _Alois P. Heinz_, Nov 29 2014