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 A233405 Number of (n+1)X(4+1) 0..2 arrays with row and column sums nondecreasing, and no adjacent elements equal 0

%I #3 Dec 09 2013 04:39:29

%S 24,100,360,1907,6931,21765,86233,274628,965494,3146010,10444724,

%T 33097949,108522965,338311791,1086568168,3360254074,10607088651,

%U 32550672493,101662193862

%N Number of (n+1)X(4+1) 0..2 arrays with row and column sums nondecreasing, and no adjacent elements equal

%C Column 4 of A233408

%e Some solutions for n=5

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 09 2013

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Last modified October 3 13:46 EDT 2023. Contains 365866 sequences. (Running on oeis4.)