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 A250682 #6 Jul 23 2025 12:41:09 %S A250682 233300,6325144,148821788,3135539502,59036115470,1009432228498, %T A250682 15971487229178,237007870055660,3338014574159778,45012529914668338, %U A250682 585376680395128804,7382961201465611866,90721080710158378470 %N A250682 Number of (6+1)X(n+1) 0..3 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction. %C A250682 Row 6 of A250676 %H A250682 R. H. Hardin, <a href="/A250682/b250682.txt">Table of n, a(n) for n = 1..73</a> %e A250682 Some solutions for n=1 %e A250682 ..0..1....0..2....0..1....2..0....2..2....0..1....0..2....0..0....2..0....0..2 %e A250682 ..0..2....1..1....1..2....2..0....2..2....0..3....0..3....0..0....0..2....2..0 %e A250682 ..2..0....0..3....0..3....1..1....3..1....2..1....3..0....0..1....2..0....2..0 %e A250682 ..0..2....3..0....1..2....1..2....1..3....0..3....2..2....1..0....2..1....2..1 %e A250682 ..0..2....1..3....1..3....2..1....2..2....3..0....2..3....1..0....2..1....2..1 %e A250682 ..1..1....2..2....2..2....3..0....2..3....3..0....2..3....2..1....1..2....1..2 %e A250682 ..1..2....2..3....2..3....2..1....2..3....2..3....2..3....1..3....2..1....3..0 %K A250682 nonn %O A250682 1,1 %A A250682 _R. H. Hardin_, Nov 26 2014