Number of n X n binary arrays symmetric about main diagonal with all ones connected only in two by two blocks.
A145860
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in two by two blocks.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =6a(4) =16a(5) =49a(6) =169a(7) =742a(8) =3848a(9) =23784a(10) =176890a(11) =1574720a(12) =16764539a(13) =214487123a(14) =3284115855a(15) =60203667877
External references
- oeis: A145860