Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1111-0110 pattern in any orientation.
A146617
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1111-0110 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =21a(6) =57a(7) =285a(8) =1551a(9) =8309a(10) =69683a(11) =754867a(12) =9884801a(13) =158671845a(14) =3311072917a(15) =81046423259
External references
- oeis: A146617