Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 3X3 plus 2,1 2,2 2,3 1,2 3,2.
A146003
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 3X3 plus 2,1 2,2 2,3 1,2 3,2.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =2a(5) =1a(6) =7a(7) =6a(8) =19a(9) =15a(10) =82a(11) =92a(12) =528a(13) =627a(14) =4309a(15) =6489a(16) =53016a(17) =91030a(18) =867823a(19) =1786877a(20) =20390977a(21) =49468143a(22) =661574922a(23) =1894696908a(24) =30092058825a(25) =102088443564
External references
- oeis: A146003