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

0,3

Links

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

Formula

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

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

Prog

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

Crossrefs

Row 7 of A052371 and A321609.

Cf. A002724, A049311.

Sequence in context: A364319 A122742 A052370 * A053305 A049311 A068590

Adjacent sequences: A053301 A053302 A053303 * A053305 A053306 A053307

Keyword

fini,full,nonn

Author

Vladeta Jovovic, Mar 05 2000

Status

approved