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 A273474 #4 May 23 2016 10:27:37 %S A273474 1,4,16,320,4430,40872,463106,5675188,63422950,710698093,8200538232, %T A273474 93691594514,1063586983374,12137123569004,138570852491100, %U A273474 1579149122960061,18003479738145524,205351456145093852,2341614891431192875,26699543185422994944,304468247045695911612 %N A273474 Number of tilings of a 3 X 5 X n box using 5n bricks of shape 3 X 1 X 1. %H A273474 Alois P. Heinz, <a href="/A273474/b273474.txt">Table of n, a(n) for n = 0..946</a> %Y A273474 Cf. A233289, A237355. %K A273474 nonn %O A273474 0,2 %A A273474 _Alois P. Heinz_, May 23 2016