A052373 Number of nonnegative integer 7 X 7 matrices with sum of elements equal to n, under row and column permutations.

1, 1, 4, 10, 33, 91, 298, 910, 2974, 9655, 32287, 108274, 367489, 1246921, 4229171, 14246120, 47542245, 156588539, 507914513, 1618965097, 5064384168, 15531406244, 46670874679, 137372332583, 396053582039, 1118577433593

Offset: 0

Author

Vladeta Jovovic, Mar 08 2000

Keywords

• nonn

Comments

a(n) = A007716(n) for n=0..7.

Links

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

Crossrefs

Row 7 of A318795.

Cf. A002724, A053307, A053304.