Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-0100-0111-0001 pattern in any orientation.
A147195
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-0100-0111-0001 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) =217a(15) =217a(16) =1805a(17) =1805a(18) =29665a(19) =29665a(20) =431133a(21) =431133a(22) =7762019a(23) =7762019a(24) =212346129a(25) =212346129
External references
- oeis: A147195