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 A219882 #5 Jul 23 2025 00:45:50 %S A219882 28,41,1158,21035,371384,6337533,113313853,2047979807,36229677541, %T A219882 611056441694 %N A219882 Number of nX7 arrays of the minimum value of corresponding elements and their horizontal, diagonal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 nX7 array. %C A219882 Column 7 of A219883 %e A219882 Some solutions for n=3 %e A219882 ..2..1..1..1..1..0..0....1..1..1..0..0..0..0....1..0..0..0..0..0..0 %e A219882 ..2..1..1..0..0..0..0....1..1..1..0..0..0..0....1..0..0..0..0..0..0 %e A219882 ..2..1..1..0..0..0..0....2..1..1..0..1..0..2....2..0..0..0..1..0..0 %K A219882 nonn %O A219882 1,1 %A A219882 _R. H. Hardin_ Nov 30 2012