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%I #8 Jul 19 2023 07:24:49
%S 7,42,4578,17232446,2303711043274
%N Number of n X n 0..6 arrays with row and column sums one greater than the previous row and column.
%e Some solutions for n=3
%e ..0..5..4....2..0..2....1..1..5....5..2..5....3..3..6....1..3..2....4..5..3
%e ..3..5..2....2..2..1....6..1..1....4..5..4....4..5..4....1..3..3....5..3..5
%e ..6..0..5....0..3..3....0..6..3....3..6..5....5..5..4....4..1..3....3..5..6
%Y Column 6 of A202864.
%K nonn,more
%O 1,1
%A _R. H. Hardin_, Dec 25 2011