Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 11000-01111-11000 pattern in any orientation.
A147455
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 11000-01111-11000 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =9a(8) =19a(9) =53a(10) =174a(11) =577a(12) =2638a(13) =14887a(14) =91688a(15) =621981a(16) =4953292a(17) =45339549a(18) =483440905a(19) =6106017477a(20) =89757755470
External references
- oeis: A147455