Number of invertible (-1,0,1) n X n matrices having (Tij = -Tji; i<j) such that all T^k (k= 1..12) are also (-1,0,1) matrices.
A072148
Number of invertible (-1,0,1) n X n matrices having (Tij = -Tji; i<j) such that all T^k (k= 1..12) are also (-1,0,1) matrices.
Terms
- a(0) =2a(1) =14a(2) =92a(3) =796a(4) =7672a(5) =83944
External references
- oeis: A072148