Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0100-1111-0100 pattern in any orientation.
A146376
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0100-1111-0100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =5a(6) =13a(7) =31a(8) =121a(9) =491a(10) =3357a(11) =25639a(12) =206564a(13) =2153667a(14) =27375428a(15) =448457031a(16) =9212009681a(17) =222552225829
External references
- oeis: A146376