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 A342599 #9 Feb 10 2022 15:25:58 %S A342599 1,3,12,74,788,16016,658220,55598924 %N A342599 Number of n X n 01-matrices with permanent 0 from which it is possible to obtain a 01-matrix with permanent 1 by increasing a single element by 1, up to permutation of rows and columns. %Y A342599 Cf. A089482, A003024, A342598. %K A342599 nonn,more,hard %O A342599 1,2 %A A342599 _Max Alekseyev_, Mar 16 2021 %E A342599 a(8) from _Max Alekseyev_, Feb 10 2022