Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0111-1100-0111 pattern in any orientation.
A147370
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0111-1100-0111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =14a(9) =9a(10) =82a(11) =25a(12) =666a(13) =57a(14) =4092a(15) =377a(16) =52105a(17) =5329a(18) =1098160a(19) =73458a(20) =31100564a(21) =886631a(22) =940187683a(23) =17314150a(24) =39465005389a(25) =625360491
External references
- oeis: A147370