Number of toroidal n X 2 binary arrays, allowing rotation and/or reflection of the rows and/or the columns.

A222187

Number of toroidal n X 2 binary arrays, allowing rotation and/or reflection of the rows and/or the columns.

Terms

    a(0) =3a(1) =7a(2) =13a(3) =34a(4) =78a(5) =237a(6) =687a(7) =2299a(8) =7685a(9) =27190a(10) =96909a(11) =353384a(12) =1296858a(13) =4808707a(14) =17920860a(15) =67169299a(16) =252745368a(17) =954677597a(18) =3617214681a(19) =13744852240a(20) =52359294790a(21) =199915018057a(22) =764884036743

External references