Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1100-0111-0001 pattern in any orientation.
A147278
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1100-0111-0001 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =5a(6) =13a(7) =29a(8) =79a(9) =475a(10) =3011a(11) =19375a(12) =140949a(13) =1504567a(14) =19831039a(15) =315319119a(16) =5871550053a(17) =136334165017
External references
- oeis: A147278