Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 10001-11111-00100 pattern in any orientation.
A147389
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation 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) =1a(7) =1a(8) =2a(9) =1a(10) =4a(11) =1a(12) =6a(13) =1a(14) =13a(15) =3a(16) =36a(17) =9a(18) =103a(19) =20a(20) =390a(21) =57a(22) =1676a(23) =190a(24) =7624a(25) =629
External references
- oeis: A147389