Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11011-01110 pattern in any orientation.
A147225
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11011-01110 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =1a(6) =10a(7) =1a(8) =26a(9) =1a(10) =220a(11) =25a(12) =1696a(13) =141a(14) =21805a(15) =844a(16) =438996a(17) =11391a(18) =9601298a(19) =152742a(20) =309244701a(21) =3160409a(22) =15392335628a(23) =110025582
External references
- oeis: A147225