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 A220159 #5 Jul 23 2025 00:54:29 %S A220159 36,266,5493,108169,2173203,42648602,822242009,15270635323 %N A220159 Number of 7Xn 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 7Xn array. %C A220159 Row 7 of A220153 %e A220159 Some solutions for n=3 %e A220159 ..1..0..1....0..0..0....1..0..0....1..1..1....0..0..0....0..0..0....0..0..0 %e A220159 ..1..0..0....0..0..0....1..1..1....0..0..1....1..1..0....0..0..0....1..0..0 %e A220159 ..2..1..1....1..0..0....1..1..1....0..0..0....1..1..2....0..1..0....1..0..2 %e A220159 ..2..2..2....1..0..1....0..1..1....1..1..0....1..1..2....0..0..0....1..0..0 %e A220159 ..2..2..2....1..0..0....0..0..0....1..0..1....1..0..2....1..0..0....1..0..0 %e A220159 ..2..2..2....1..1..2....2..1..0....2..0..0....2..0..0....1..0..0....1..0..0 %e A220159 ..2..2..2....1..1..1....2..1..1....2..0..0....2..1..1....2..1..1....2..2..1 %K A220159 nonn %O A220159 1,1 %A A220159 _R. H. Hardin_ Dec 06 2012