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 A220158 #5 Jul 23 2025 00:54:23 %S A220158 28,163,2062,24684,279304,3057777,32566283,333052410,3282105763, %T A220158 31220019553 %N A220158 Number of 6Xn arrays of the minimum value of corresponding elements and their horizontal or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 6Xn array. %C A220158 Row 6 of A220153 %e A220158 Some solutions for n=3 %e A220158 ..0..0..0....0..0..0....0..0..0....1..0..0....0..0..0....0..0..0....1..1..1 %e A220158 ..0..0..0....1..0..0....0..0..0....1..0..0....0..0..0....1..0..0....1..1..1 %e A220158 ..1..0..0....0..0..2....1..1..0....1..0..0....1..1..0....1..1..1....1..1..1 %e A220158 ..1..0..0....0..0..0....1..1..1....2..0..0....1..1..1....0..1..1....1..0..1 %e A220158 ..1..1..1....1..0..0....1..1..1....2..0..0....1..1..1....0..0..0....2..0..0 %e A220158 ..2..1..2....1..0..0....2..1..2....2..2..2....1..1..2....1..0..0....2..1..1 %K A220158 nonn %O A220158 1,1 %A A220158 _R. H. Hardin_ Dec 06 2012