Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0010-1110-0111-0100 pattern in any orientation.

A146907

Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0010-1110-0111-0100 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =3a(4) =1a(5) =3a(6) =1a(7) =5a(8) =7a(9) =23a(10) =21a(11) =73a(12) =67a(13) =331a(14) =379a(15) =2159a(16) =3073a(17) =18347a(18) =29787a(19) =200555a(20) =362821a(21) =2889871a(22) =5926103a(23) =54516713a(24) =129199873a(25) =1351622999a(26) =3735869433a(27) =44518336027a(28) =139642079573

External references