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 A223760 #6 Jul 23 2025 04:28:47 %S A223760 610,372100,74824917,6754232986,350182483445,12025063773557, %T A223760 298630624023222,5692159574625373,86933612444360250, %U A223760 1098959847553820404,11794801172063561487,109687177820504204805,898680887461860405330 %N A223760 Number of nX6 0..3 arrays with rows, antidiagonals and columns unimodal. %C A223760 Column 6 of A223762 %H A223760 R. H. Hardin, <a href="/A223760/b223760.txt">Table of n, a(n) for n = 1..16</a> %e A223760 Some solutions for n=3 %e A223760 ..0..0..0..1..1..3....0..0..0..3..3..1....0..0..0..0..2..1....0..0..0..1..2..3 %e A223760 ..0..0..0..2..3..1....0..0..0..3..2..1....0..0..0..2..2..0....0..0..0..1..2..2 %e A223760 ..0..0..0..1..1..0....0..0..0..1..0..0....0..0..1..2..2..0....0..0..0..1..3..1 %K A223760 nonn %O A223760 1,1 %A A223760 _R. H. Hardin_ Mar 27 2013