Number of n X n ortho-projection matrices over GF(2). Also, the number of labeled ortho-projection graphs on n vertices.
A081080
Number of n X n ortho-projection matrices over GF(2). Also, the number of labeled ortho-projection graphs on n vertices.
Terms
- a(0) =2a(1) =4a(2) =10a(3) =38a(4) =194a(5) =1378a(6) =13570a(7) =188546a(8) =3664898a(9) =100027906
External references
- oeis: A081080