A213960 - OEIS

%I #6 Sep 08 2022 12:57:27

%S 7,980,3323712,256652587891,447939229940051654,

%T 17583943206407091985366455

%N Number of n X n 0..6 matrices with row and column i=1..n having sum <= i*6.

%C Column 6 of A213962.

%e Some solutions for n=4

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

%e ..0..5..5..0....1..4..0..1....0..3..1..5....1..1..6..0....1..0..1..4

%e ..5..0..3..6....1..5..3..3....0..3..4..4....4..4..1..0....0..1..3..4

%e ..0..0..4..5....0..0..1..0....3..0..4..1....0..5..2..5....0..4..6..6

%Y Cf. A213962.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 28 2012