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 A202634 #6 Jul 22 2025 16:44:15 %S A202634 108,32676,8196796,1960824272,459796683544,106682611433736, %T A202634 24584277764975388,5638735096577721148,1289001492923309570328, %U A202634 293932444114275034112864 %N A202634 Number of nX4 0..3 arrays with adjacent row and column sums unequal. %C A202634 Column 4 of A202636 %e A202634 Some solutions for n=2 %e A202634 ..1..0..2..3....0..3..1..1....2..1..2..2....0..1..1..1....2..1..2..3 %e A202634 ..2..0..0..2....2..2..0..2....0..2..0..2....2..2..0..3....3..2..0..1 %K A202634 nonn %O A202634 1,1 %A A202634 _R. H. Hardin_ Dec 21 2011