Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 10001-11111-00100 pattern in any orientation.
A147390
Number of n X n binary arrays symmetric 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) =5a(8) =10a(9) =19a(10) =36a(11) =65a(12) =146a(13) =407a(14) =1091a(15) =3253a(16) =10430a(17) =34729a(18) =123767a(19) =502614a(20) =2115588a(21) =9918395a(22) =49148200a(23) =263504620
External references
- oeis: A147390