Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1010-1111 pattern in any orientation.
A146427
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1010-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =15a(7) =29a(8) =65a(9) =155a(10) =571a(11) =2003a(12) =10561a(13) =41709a(14) =230027a(15) =1186171a(16) =9353621a(17) =63521901a(18) =612736753a(19) =4999574693a(20) =59290750729a(21) =622330543047
External references
- oeis: A146427