A246149 Number of inequivalent n X 4 binary matrices, where equivalence means permutations of rows or columns or the symbol set.

1, 3, 14, 47, 173, 545, 1682, 4745, 12791, 32327, 78040, 179201, 395178, 837103, 1713036, 3391541, 6520796, 12195482, 22245864, 39638722, 69130894, 118164586, 198257980, 326885254, 530284337, 847202952, 1334313866, 2073348286, 3181127987, 4822620934, 7228875542

Offset

0,2

Links

Table of n, a(n) for n=0..30.

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

Crossrefs

Column k=4 of A242093.

Sequence in context: A281869 A202144 A287426 * A201349 A006900 A212505

Adjacent sequences: A246146 A246147 A246148 * A246150 A246151 A246152

Keyword

nonn

Author

Alois P. Heinz, Aug 17 2014

Status

approved