Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0100-1111-0100 pattern in any orientation.
A146375
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0100-1111-0100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =21a(9) =9a(10) =201a(11) =25a(12) =1634a(13) =125a(14) =22896a(15) =1331a(16) =494897a(17) =18779a(18) =18283376a(19) =389231a(20) =1000392247a(21) =11969301a(22) =84124514832a(23) =573650431a(25) =41782304071
External references
- oeis: A146375