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 A247769 #10 May 02 2022 10:01:18 %S A247769 1,1,5,48,423,3082,18998,133083,965175,6907447,48357538,337492571, %T A247769 2379164196,16812509746,118525108279,834050273099,5871294215587, %U A247769 41366373307538,291469733924989,2053121255070040,14460522145205162,101855876591455305,717493569094700741 %N A247769 Number of tilings of a 5 X n rectangle using n pentominoes of any but the N shape. %H A247769 Alois P. Heinz, <a href="/A247769/b247769.txt">Table of n, a(n) for n = 0..500</a> %H A247769 Wikipedia, <a href="https://en.wikipedia.org/wiki/Pentomino">Pentomino</a> %F A247769 a(n) ~ c * d^n, where d = 7.04397539498320599943308475324574337362579863618900362092946272591..., c = 0.15989322823686781502117997501523372089722059935465319293786933934... . - _Vaclav Kotesovec_, Mar 05 2016 %Y A247769 Column k=0 of A247705. %Y A247769 Cf. A174249, A233427. %K A247769 nonn %O A247769 0,3 %A A247769 _Alois P. Heinz_, Sep 23 2014