Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 01000-11111-01000 pattern in any orientation.
A147022
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 01000-11111-01000 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =5a(7) =13a(8) =31a(9) =111a(10) =377a(11) =1541a(12) =10233a(13) =72291a(14) =558454a(15) =5131417a(16) =54944663a(17) =692190273a(18) =10939712070a(19) =204848963285
External references
- oeis: A147022