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 A224350 #8 Jul 23 2025 05:06:37 %S A224350 21,441,5840,57387,495985,4231138,37433596,342170839,3178789749, %T A224350 29672959682,277160393375,2589242347971,24204240827093, %U A224350 226449704878547,2120085885822119,19857888410207651,186050078426398273 %N A224350 Number of nX5 0..2 arrays with diagonals and antidiagonals unimodal and rows nondecreasing. %C A224350 Column 5 of A224353 %H A224350 R. H. Hardin, <a href="/A224350/b224350.txt">Table of n, a(n) for n = 1..210</a> %H A224350 R. H. Hardin, <a href="/A224350/a224350.txt">Empirical recurrence of order 56</a> %F A224350 Empirical recurrence of order 56 (see link above) %e A224350 Some solutions for n=3 %e A224350 ..0..0..0..2..2....0..0..0..0..1....1..1..1..1..1....0..0..1..2..2 %e A224350 ..1..1..2..2..2....1..1..1..1..2....0..1..1..1..2....1..1..1..2..2 %e A224350 ..0..0..0..2..2....0..0..1..1..1....1..1..1..1..1....0..0..0..0..2 %K A224350 nonn %O A224350 1,1 %A A224350 _R. H. Hardin_ Apr 04 2013