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 A004246 #14 Oct 24 2023 21:01:05 %S A004246 8,25,144,735,4608,39285,362000,3628185,40808448,478988081,6227101888, %T A004246 87248724750,1300561920000,20922788404479,355587467242752, %U A004246 6402373698206889,121810906419200000 %N A004246 Number of permutations of length n with spread 3. %H A004246 R. L. Graham, and D. H. Lehmer, <a href="https://doi.org/10.1017/S1446788700019339">On the Permanent of Schur's Matrix</a>, Jour. Australian Math. Soc. 21(4) (series A) (1976), 487-497. %K A004246 nonn %O A004246 4,1 %A A004246 _N. J. A. Sloane_ %E A004246 More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), May 17 2007