Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 11100-00100-00111 pattern in any orientation.
A147250
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 11100-00100-00111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =7a(7) =15a(8) =31a(9) =125a(10) =537a(11) =2497a(12) =11379a(13) =73403a(14) =564557a(15) =5044749a(16) =48150503a(17) =565823439a(18) =7944991263a(19) =131881718303
External references
- oeis: A147250