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

1,2

Links

Table of n, a(n) for n=1..12.

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.

Sequence in context: A217358 A323692 A360782 * A005312 A341576 A143817

Adjacent sequences: A351818 A351819 A351820 * A351822 A351823 A351824

Keyword

nonn,hard,more

Author

Stefano Spezia, Feb 20 2022

Extensions

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

Status

approved