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 A240374 #6 Jun 02 2025 09:52:07 %S A240374 10,155,1729,36398,486179,6436979,110122847,1403151574,20729739995, %T A240374 314460587672,4129507235966,62894928616313,899396661401712, %U A240374 12459403539502242,186844736024568319,2621133895463593999 %N A240374 Number of nX5 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4. %C A240374 Column 5 of A240376 %H A240374 R. H. Hardin, <a href="/A240374/b240374.txt">Table of n, a(n) for n = 1..210</a> %e A240374 Some solutions for n=4 %e A240374 ..3..3..2..3..3....3..3..2..3..3....2..2..3..2..3....3..3..2..3..3 %e A240374 ..2..2..2..1..1....2..2..0..3..1....2..1..3..0..1....3..1..0..3..1 %e A240374 ..3..1..0..0..0....3..1..0..0..3....3..1..0..0..2....2..2..2..2..0 %e A240374 ..2..2..0..3..2....2..1..1..2..2....3..2..1..2..2....3..1..2..0..2 %K A240374 nonn %O A240374 1,1 %A A240374 _R. H. Hardin_, Apr 04 2014