Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 10001-11111-00100 pattern in any orientation.
A147387
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 10001-11111-00100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =9a(8) =20a(9) =57a(10) =190a(11) =629a(12) =2776a(13) =15917a(14) =99291a(15) =695261a(16) =5658010a(17) =52047047a(18) =554192227a(19) =6986434456a(20) =103110572004
External references
- oeis: A147387