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 A270070 #6 Feb 06 2017 12:40:19 %S A270070 1,28,41956,37655502,33738191906,30334909910156,27412100990502042, %T A270070 24725866354382952217,22294594753523459270694, %U A270070 20109634299824273864511862,18137923612752525595542410804,16359025960283827167827032525174,14754787194922572653415156965320636 %N A270070 Number of tilings of a 10 X n rectangle using monominoes and trominoes of any shape. %H A270070 Alois P. Heinz, <a href="/A270070/b270070.txt">Table of n, a(n) for n = 0..150</a> %H A270070 Wikipedia, <a href="https://en.wikipedia.org/wiki/Tromino">Tromino</a> %Y A270070 Column k=10 of A270061. %K A270070 nonn %O A270070 0,2 %A A270070 _Alois P. Heinz_, Mar 09 2016