cp's OEIS Frontend

A212947 Number of 5Xn 0..n-1 arrays with no column j greater than or equal to than column j-1 in all rows.

%I A212947 #6 Jul 22 2025 23:01:27
%S A212947 1,781,10669771,801439905901,212180664326328751,
%T A212947 153322267564381742818531,255478496068295791189905082231,
%U A212947 870723772630086411238479367066774381,5548968833443344688974970978997318268321031
%N A212947 Number of 5Xn 0..n-1 arrays with no column j greater than or equal to than column j-1 in all rows.
%C A212947 Row 5 of A212943
%H A212947 R. H. Hardin, <a href="/A212947/b212947.txt">Table of n, a(n) for n = 1..18</a>
%e A212947 Some solutions for n=4
%e A212947 ..1..1..0..0....1..2..3..2....3..2..1..3....2..0..1..2....1..0..3..3
%e A212947 ..3..1..3..0....3..1..1..1....1..3..0..0....3..2..0..1....3..2..1..3
%e A212947 ..1..0..1..3....3..3..3..1....1..0..2..0....2..1..1..1....2..2..2..2
%e A212947 ..2..3..1..3....3..1..3..3....1..0..2..0....0..2..1..3....3..2..2..3
%e A212947 ..2..2..1..1....3..1..0..3....1..1..1..1....3..1..2..0....1..1..2..1
%K A212947 nonn
%O A212947 1,2
%A A212947 _R. H. Hardin_ May 31 2012