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 A223958 #8 Jul 23 2025 04:41:46 %S A223958 56,1876,36028,594286,9779558,163752797,2772658693,47273211674, %T A223958 809416786834,13894273785956,238867008057298,4110191305837227, %U A223958 70761275087518799,1218613301433676245,20990363391641556709 %N A223958 Number of nX5 0..3 arrays with antidiagonals unimodal and rows and diagonals nondecreasing. %C A223958 Column 5 of A223961 %H A223958 R. H. Hardin, <a href="/A223958/b223958.txt">Table of n, a(n) for n = 1..210</a> %H A223958 R. H. Hardin, <a href="/A223958/a223958.txt">Empirical recurrence of order 63</a> %F A223958 Empirical recurrence of order 63 (see link above) %e A223958 Some solutions for n=3 %e A223958 ..0..0..0..3..3....0..1..1..2..2....0..1..1..1..1....0..0..0..0..3 %e A223958 ..0..0..2..3..3....1..2..3..3..3....0..1..1..2..3....0..0..2..3..3 %e A223958 ..1..2..3..3..3....1..3..3..3..3....0..1..2..2..2....0..1..1..2..3 %K A223958 nonn %O A223958 1,1 %A A223958 _R. H. Hardin_ Mar 29 2013