Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0100-1110-0111-0010 pattern in any orientation.
A146916
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0100-1110-0111-0010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =1a(5) =5a(6) =9a(7) =25a(8) =65a(9) =311a(10) =777a(11) =5163a(12) =19629a(13) =179101a(14) =938309a(15) =11522939a(16) =83049733a(17) =1385281995a(18) =13583413581a(19) =310426685067
External references
- oeis: A146916