A351821 Maximal sum of inverse squares of the singular values of Toeplitz anti-Hadamard matrices of order n.

1, 3, 7, 16, 46, 138, 601, 2619, 16162, 93531, 654700, 4442304

Offset: 1

Author

Stefano Spezia, Feb 20 2022

Keywords

• nonn
• hard
• more

Links

• R. L. Graham and N. J. A. Sloane, Anti-Hadamard matrices, Linear Alg. Applic., 62 (1984), 113-137, Table 1.

Crossrefs

Cf. A005312, A005313, A351240, A351241.

Extensions

a(12) confirmed and inserted by Stefano Spezia, Mar 16 2022