cp's OEIS Frontend

A212936 Number of 7Xn 0..n-1 arrays with no column j greater than column j-1 in all rows.

%I A212936 #6 Jul 22 2025 22:59:40
%S A212936 1,16383,10450787266,71832238695530495,2891333179750701904296876,
%T A212936 475997448692406224810330915906802,
%U A212936 252848108054080530934326716965286554552380
%N A212936 Number of 7Xn 0..n-1 arrays with no column j greater than column j-1 in all rows.
%C A212936 Row 7 of A212930
%H A212936 R. H. Hardin, <a href="/A212936/b212936.txt">Table of n, a(n) for n = 1..15</a>
%e A212936 Some solutions for n=3
%e A212936 ..2..0..2....0..2..2....0..0..0....1..2..0....0..1..1....2..0..0....2..0..1
%e A212936 ..2..0..2....1..1..2....1..0..2....1..2..2....2..2..2....0..2..0....0..0..2
%e A212936 ..2..0..1....2..1..2....1..1..1....0..0..1....1..0..0....0..1..1....1..1..2
%e A212936 ..2..1..2....0..1..1....2..0..2....1..2..0....0..0..1....1..0..1....0..0..1
%e A212936 ..1..2..1....2..1..1....2..0..1....1..2..1....2..1..0....2..2..1....2..2..2
%e A212936 ..0..2..1....0..1..2....1..0..1....2..2..0....0..2..0....0..1..1....1..2..1
%e A212936 ..1..1..2....0..1..1....1..1..1....0..0..2....0..2..1....0..0..2....0..2..2
%K A212936 nonn
%O A212936 1,2
%A A212936 _R. H. Hardin_ May 31 2012