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

A246149

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

Terms

    a(0) =1a(1) =3a(2) =14a(3) =47a(4) =173a(5) =545a(6) =1682a(7) =4745a(8) =12791a(9) =32327a(10) =78040a(11) =179201a(12) =395178a(13) =837103a(14) =1713036a(15) =3391541a(16) =6520796a(17) =12195482a(18) =22245864a(19) =39638722a(20) =69130894a(21) =118164586a(22) =198257980a(23) =326885254a(24) =530284337a(25) =847202952a(26) =1334313866a(27) =2073348286a(28) =3181127987a(29) =4822620934

External references