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Number of n X n 0..5 matrices with row and column i=1..n having sum <= i*5
0

%I #4 Dec 18 2015 18:18:12

%S 6,546,909900,26346319032,13186531254708756,113762889909962601897876

%N Number of n X n 0..5 matrices with row and column i=1..n having sum <= i*5

%C Column 5 of A213962

%e Some solutions for n=4

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

%e ..0..3..3..0....0..4..5..0....0..2..5..2....1..0..3..3....2..5..0..2

%e ..0..4..3..0....0..5..5..3....1..5..4..4....0..2..4..5....0..0..1..2

%e ..0..3..0..0....0..0..1..5....0..0..4..4....0..0..2..3....0..5..4..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 28 2012