Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0100-0100-1111-0010 pattern in any orientation.
A147030
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0100-0100-1111-0010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =13a(7) =31a(8) =77a(9) =387a(10) =2257a(11) =17627a(12) =156913a(13) =1449769a(14) =17078273a(15) =269362403a(16) =5270658519a(17) =128747962057
External references
- oeis: A147030