Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0100-1100-0111-0010 pattern in any orientation.
A147045
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0100-1100-0111-0010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =5a(9) =5a(10) =17a(11) =17a(12) =45a(13) =45a(14) =273a(15) =273a(16) =2925a(17) =2925a(18) =46625a(19) =46625a(20) =908301a(21) =908301a(22) =25944849a(23) =25944849a(24) =1141847565a(25) =1141847565a(26) =74712257377a(27) =74712257377
External references
- oeis: A147045