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

0,3

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.

Sequence in context: A318563 A052367 A052372 * A007716 A122948 A317800

Adjacent sequences: A052370 A052371 A052372 * A052374 A052375 A052376

Keyword

nonn

Author

Vladeta Jovovic, Mar 08 2000

Status

approved