Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0100-0100-1111-0010-0010 pattern in any orientation.

A147344

Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0100-0100-1111-0010-0010 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =3a(9) =15a(10) =29a(11) =45a(12) =73a(13) =153a(14) =491a(15) =1439a(16) =4619a(17) =16351a(18) =52019a(19) =195927a(20) =800019a(21) =3525897a(22) =17183583a(23) =88313479

External references