A246152 Number of inequivalent n X 7 binary matrices, where equivalence means permutations of rows or columns or the symbol set.

1, 4, 40, 367, 4745, 68379, 1072086, 16821330, 254092124, 3608247685, 47733362102, 587016912645, 6721970343643, 71907225898320, 721352899257954, 6812732993272120, 60802368520799533, 514586622373193034, 4143078743506122930, 31825800605751740274

Offset

0,2

Links

Table of n, a(n) for n=0..19.

Index to number of inequivalent matrices modulo permutation of rows and columns

Crossrefs

Column k=7 of A242093.

Sequence in context: A222273 A220366 A220310 * A155641 A122652 A299867

Adjacent sequences: A246149 A246150 A246151 * A246153 A246154 A246155

Keyword

nonn

Author

Alois P. Heinz, Aug 17 2014

Status

approved