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 A203893 Number of (n+1)X6 0..4 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) such that rows of b(i,j) and columns of c(i,j) are lexicographically nondecreasing 0

%I #4 Mar 31 2012 12:36:58

%S 940270,1905833494,9042090593477,36337203300044690,

%T 116191919935256968675,304473777397661322628561,

%U 675997322694333574295767738

%N Number of (n+1)X6 0..4 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) such that rows of b(i,j) and columns of c(i,j) are lexicographically nondecreasing

%C Column 5 of A203896

%e Some solutions for n=4

%e ..0..0..2..3..4..4....1..3..1..3..1..1....2..1..2..3..4..1....4..2..2..3..2..2

%e ..1..1..3..3..2..2....2..2..4..2..4..4....0..3..3..2..1..4....2..4..4..3..4..4

%e ..4..4..0..0..2..2....0..4..2..4..3..3....4..2..1..3..4..1....4..3..3..4..3..4

%e ..4..4..4..4..3..3....2..2..4..4..1..2....2..4..0..0..0..3....4..3..4..3..4..2

%e ..4..4..4..4..3..3....2..3..2..3..1..4....4..4..2..4..0..4....3..4..3..4..4..2

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 07 2012

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Last modified December 10 09:21 EST 2023. Contains 367704 sequences. (Running on oeis4.)