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 A275921 #15 Aug 29 2016 02:55:44 %S A275921 56,9408,11270400,27206658048,112681643083776,746988383076286464, %T A275921 7533492323047902093312,111048869433803210653040640, %U A275921 2315236533572491933131807916032,66415035616070432053233927044726784,2560483881619577552584872021599994249216 %N A275921 Number of 5 X n Latin rectangles. %H A275921 N. J. A. Sloane, <a href="/A275921/b275921.txt">Table of n, a(n) for n = 5..40</a> [Moused from the table in Stones et al. 2016] %H A275921 R. J. Stones, S. Lin, X. Liu, G. Wang, <a href="http://dx.doi.org/10.1007/s00373-015-1643-1">On Computing the Number of Latin Rectangles</a>, Graphs and Combinatorics (2016) 32:1187-1202; DOI 10.1007/s00373-015-1643-1 %Y A275921 Cf. A000179, A000186, A001623. %K A275921 nonn %O A275921 5,1 %A A275921 _N. J. A. Sloane_, Aug 28 2016