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 A223810 #5 Jul 23 2025 04:33:08 %S A223810 610,372100,62305953,4146732319,151474085262,3678996027680, %T A223810 66795003874023,975436194200049,12003684951893750,128311788458764246, %U A223810 1215992796769138594 %N A223810 Number of nX6 0..3 arrays with rows, columns, diagonals and antidiagonals unimodal. %C A223810 Column 6 of A223811 %e A223810 Some solutions for n=3 %e A223810 ..0..0..0..2..3..1....0..0..0..1..3..2....0..0..0..2..2..1....0..0..0..1..2..0 %e A223810 ..0..0..0..2..2..1....0..0..0..3..3..0....0..0..0..1..0..0....0..0..0..2..3..3 %e A223810 ..0..0..0..0..2..2....0..0..1..1..1..0....0..0..0..0..0..0....0..0..0..2..0..0 %K A223810 nonn %O A223810 1,1 %A A223810 _R. H. Hardin_ Mar 27 2013