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A212946 Number of 4Xn 0..n-1 arrays with no column j greater than or equal to than column j-1 in all rows 1

%I #4 May 31 2012 13:01:45

%S 1,175,331489,2509306671,52311221188001,2438624218076957695,

%T 221920456466342315024785,35805749325509532346413477679,

%U 9531951779328890331855321215698177

%N Number of 4Xn 0..n-1 arrays with no column j greater than or equal to than column j-1 in all rows

%C Row 4 of A212943

%H R. H. Hardin, <a href="/A212946/b212946.txt">Table of n, a(n) for n = 1..18</a>

%e Some solutions for n=4

%e ..3..3..2..1....1..3..2..1....2..1..1..1....3..3..0..0....0..0..1..0

%e ..3..2..2..2....1..1..0..3....0..2..1..3....3..3..3..2....2..2..0..1

%e ..2..3..2..2....2..3..3..0....3..1..2..0....1..0..1..0....3..2..0..0

%e ..3..1..1..2....1..0..3..0....2..2..1..2....1..1..0..3....0..0..1..0

%K nonn

%O 1,2

%A _R. H. Hardin_ May 31 2012

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Last modified April 24 15:18 EDT 2024. Contains 371960 sequences. (Running on oeis4.)