Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1111-0100 pattern in any orientation.
A146412
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1111-0100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =25a(6) =59a(7) =371a(8) =1829a(9) =12351a(10) =114789a(11) =1410427a(12) =19272237a(13) =385707683a(14) =8418983493a(15) =256858401273
External references
- oeis: A146412