Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0110-1111 pattern in any orientation.
A146386
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0110-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =1a(7) =4a(8) =1a(9) =6a(10) =3a(11) =16a(12) =10a(13) =59a(14) =29a(15) =271a(16) =100a(17) =1436a(18) =387a(19) =8334a(20) =2276a(21) =60777a(22) =17581a(23) =593102a(24) =155034a(25) =7275019a(26) =1632582a(27) =107601705a(28) =20304423a(29) =1902586023
External references
- oeis: A146386