Number of real {0,1} n X n matrices A such that M = A + A' has 2's on the main diagonal, 0's and 1's elsewhere and is positive semi-definite.
A038379
Number of real {0,1} n X n matrices A such that M = A + A' has 2's on the main diagonal, 0's and 1's elsewhere and is positive semi-definite.
Terms
- a(0) =1a(1) =3a(2) =27a(3) =729a(4) =52649a(5) =9058475a(6) =3383769523
External references
- oeis: A038379