a(n) is the number of n X n nonsingular symmetric Toeplitz matrices using all the integers 0, 1, 2, ..., n-1.

A364791

a(n) is the number of n X n nonsingular symmetric Toeplitz matrices using all the integers 0, 1, 2, ..., n-1.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =23a(4) =120a(5) =718a(6) =5005a(7) =40274a(8) =362592a(9) =3627920a(10) =39909484a(11) =478991123

External references