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 A219468 #6 Jul 23 2025 00:29:50 %S A219468 35,547,28159,1227441,43792361,1357658929,37552353044,947150536824, %T A219468 22129769822973,483036569368799,9904217535401123,191717483791553680, %U A219468 3519902109176030571,61551065872538233732,1028861754560712576407 %N A219468 Number of nX5 arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..3 nX5 array. %C A219468 Column 5 of A219471 %H A219468 R. H. Hardin, <a href="/A219468/b219468.txt">Table of n, a(n) for n = 1..84</a> %e A219468 Some solutions for n=3 %e A219468 ..1..1..2..2..2....0..0..1..1..1....2..2..2..0..0....0..0..1..0..2 %e A219468 ..2..2..2..2..2....1..1..1..0..0....2..0..0..0..0....1..0..0..0..1 %e A219468 ..3..3..2..2..3....1..3..1..0..2....1..0..0..2..3....0..0..0..1..3 %K A219468 nonn %O A219468 1,1 %A A219468 _R. H. Hardin_ Nov 20 2012