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 A220058 #6 Nov 28 2016 00:36:53 %S A220058 1,1,1793,79339,11758369,1057354073,115136505933,11621270470141, %T A220058 1208344842789831,124179182077944123,12820466607209726137, %U A220058 1321211811196491541315,136254474646105474794407,14047759147701072483029529,1448476467705491364792194617 %N A220058 Number of tilings of an 8 X n rectangle using right trominoes and 1 X 1 tiles. %H A220058 Alois P. Heinz, <a href="/A220058/b220058.txt">Table of n, a(n) for n = 0..200</a> %Y A220058 Column k=8 of A220054. %K A220058 nonn %O A220058 0,3 %A A220058 _Alois P. Heinz_, Dec 03 2012