Number of n X n symmetric binary matrices with each 1 adjacent to an odd number of other 1's.
A140964
Number of n X n symmetric binary matrices with each 1 adjacent to an odd number of other 1's.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =47a(5) =331a(6) =3767a(7) =62520a(8) =1518009a(9) =55743394a(10) =3088601538a(11) =255245736384
External references
- oeis: A140964