Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1001-1111 pattern in any orientation.
A147138
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1001-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =9a(5) =17a(6) =47a(7) =169a(8) =947a(9) =4301a(10) =28001a(11) =189379a(12) =2123749a(13) =21459731a(14) =367346875a(15) =5385601539
External references
- oeis: A147138