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 A322503 #5 Dec 12 2018 17:15:21 %S A322503 1,1,89,3620,136002,5044388,186735416,6897569624,254605651987, %T A322503 9394097589045,346688563051200,12783317143959681,471522273648618022, %U A322503 17392356171712222007,641526227823336378247,23663017416745429407437,872822255075124794048661 %N A322503 Number of tilings of a 10 X n rectangle using V (2m+1)-ominoes (m >= 0) in standard orientation. %C A322503 The shapes of the tiles are: %C A322503 ._. %C A322503 ._. | | %C A322503 ._. | | | | %C A322503 ._. | |_. | |_._. | |_._._. %C A322503 |_| |___| |_____| |_______| ... . %H A322503 Alois P. Heinz, <a href="/A322503/b322503.txt">Table of n, a(n) for n = 0..40</a> %H A322503 Wikipedia, <a href="https://en.wikipedia.org/wiki/Polyomino">Polyomino</a> %Y A322503 Column k=10 of A322494. %K A322503 nonn %O A322503 0,3 %A A322503 _Alois P. Heinz_, Dec 12 2018