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 A223972 #8 Jul 23 2025 04:43:48 %S A223972 86,7396,440628,22935921,1140963027,55803232969,2708281019793, %T A223972 131014406127439,6329626912147424,305632588672082728, %U A223972 14754359445820013164,712195518319828970133,34376429801121343195388 %N A223972 Number of nX5 0..2 arrays with rows and antidiagonals unimodal. %C A223972 Column 5 of A223975 %H A223972 R. H. Hardin, <a href="/A223972/b223972.txt">Table of n, a(n) for n = 1..210</a> %H A223972 R. H. Hardin, <a href="/A223972/a223972.txt">Empirical recurrence of order 43</a> %F A223972 Empirical recurrence of order 43 (see link above) %e A223972 Some solutions for n=3 %e A223972 ..0..0..2..1..0....0..0..2..2..0....0..0..1..2..1....0..0..0..1..1 %e A223972 ..1..2..1..1..0....0..2..2..2..2....1..1..1..1..2....0..0..2..2..2 %e A223972 ..0..0..0..1..0....0..0..0..0..0....0..0..2..2..1....0..0..2..2..0 %K A223972 nonn %O A223972 1,1 %A A223972 _R. H. Hardin_ Mar 30 2013