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 A322498 #9 Dec 12 2018 10:34:57 %S A322498 1,1,8,44,233,1262,6523,34468,181615,957006,5044388,26575335, %T A322498 140039124,737911089,3888300180,20488828781,107962314409,568889946804, %U A322498 2997672175041,15795742092745,83233076938962,438583048406589,2311041500385152,12177654397383350 %N A322498 Number of tilings of a 5 X n rectangle using V (2m+1)-ominoes (m >= 0) in standard orientation. %C A322498 The shapes of the tiles are: %C A322498 ._. %C A322498 ._. | | %C A322498 ._. | | | | %C A322498 ._. | |_. | |_._. | |_._._. %C A322498 |_| |___| |_____| |_______| ... . %H A322498 Alois P. Heinz, <a href="/A322498/b322498.txt">Table of n, a(n) for n = 0..1000</a> %H A322498 Wikipedia, <a href="https://en.wikipedia.org/wiki/Polyomino">Polyomino</a> %H A322498 <a href="/index/Rec#order_16">Index entries for linear recurrences with constant coefficients</a>, signature (1,10,36,93,240,392,551,576,361,324,58,58,57,-76,50,-10). %F A322498 G.f.: (2*x^11 -8*x^10 +4*x^9 -7*x^8 -18*x^7 -29*x^6 -32*x^5 -20*x^4 -10*x^3 -3*x^2+1) / (10*x^16 -50*x^15 +76*x^14 -57*x^13 -58*x^12 -58*x^11 -324*x^10 -361*x^9 -576*x^8 -551*x^7 -392*x^6 -240*x^5 -93*x^4 -36*x^3 -10*x^2 -x+1). %Y A322498 Column k=5 of A322494. %K A322498 nonn,easy %O A322498 0,3 %A A322498 _Alois P. Heinz_, Dec 12 2018