A053304 Number of 7 X 7 binary matrices with n=0..49 ones up to row and column permutations.

1, 1, 3, 6, 16, 34, 90, 211, 515, 1229, 2960, 6893, 15753, 34450, 72235, 143477, 269186, 473945, 781713, 1203617, 1728192, 2310376, 2874232, 3325215, 3576980, 3576980, 3325215, 2874232, 2310376, 1728192, 1203617, 781713, 473945, 269186

Offset: 0

Author

Vladeta Jovovic, Mar 05 2000

Keywords

• fini
• full
• nonn

Links

• Andrew Howroyd, Table of n, a(n) for n = 0..49

Crossrefs

Row 7 of A052371 and A321609.

Cf. A002724, A049311.

Programs

PARI

\\ See A321609 for M.
vector(50, n, M(7,7,n-1))

Formula

a(n) = A049311(n) for n <= 7.

Sum_{n=0..49} a(n) = 33642660 = A002724(7).