Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0100-0100-1111-0100 pattern in any orientation.
A147041
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0100-0100-1111-0100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =3a(8) =15a(9) =27a(10) =43a(11) =77a(12) =211a(13) =651a(14) =2217a(15) =7655a(16) =29663
External references
- oeis: A147041