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 A203670 Number of (n+1)X7 0..6 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) nondecreasing in column and row directions, respectively 0

%I #4 Mar 31 2012 12:36:57

%S 67221763,16256618529,2567705516301,248951034536521,16249513382398064,

%T 762808281322416881,27330475005789023048,778241788065663598911

%N Number of (n+1)X7 0..6 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) nondecreasing in column and row directions, respectively

%C Column 6 of A203672

%e Some solutions for n=4

%e ..2..1..5..5..4..4..4....4..6..4..4..5..5..5....6..5..5..6..6..6..6

%e ..5..6..5..5..6..6..6....6..4..6..6..6..6..6....5..6..6..6..6..6..6

%e ..6..5..6..6..6..6..6....4..6..6..6..6..6..6....6..6..6..6..6..6..6

%e ..5..6..6..6..6..6..6....4..6..6..6..6..6..6....6..6..6..6..6..6..6

%e ..5..6..6..6..6..6..6....6..6..6..6..6..6..6....6..6..6..6..6..6..6

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 04 2012

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Last modified December 3 05:03 EST 2023. Contains 367531 sequences. (Running on oeis4.)