A052372 Number of nonnegative integer 6 X 6 matrices with sum of elements equal to n, under row and column permutations.

1, 1, 4, 10, 33, 91, 298, 881, 2825, 8791, 27947, 87410, 272991, 837370, 2532012, 7496030, 21735743, 61570427, 170399621, 460413115, 1214983434, 3131870712, 7890604652, 19441462894, 46878788710, 110702854983, 256217556777

Offset

0,3

Links

Andrew Howroyd, Table of n, a(n) for n = 0..1000

Crossrefs

Row 6 of A318795.

Cf. A002724, A053307.

Sequence in context: A309682 A318563 A052367 * A052373 A007716 A122948

Adjacent sequences: A052369 A052370 A052371 * A052373 A052374 A052375

Keyword

nonn

Author

Vladeta Jovovic, Mar 08 2000

Status

approved