1,2

This count includes equivalent matrices.

Table of n, a(n) for n=1..5.

Eric Weisstein's World of Mathematics, Hadamard's Maximum Determinant Problem

Eric Weisstein's World of Mathematics, (-1, 0, 1)-Matrix

Index entries for sequences related to Hadamard matrices

Index entries for sequences related to maximal determinants

Cf. A003433.

Sequence in context: A281614 A132551 A013953 * A323996 A094073 A137342

Adjacent sequences: A051750 A051751 A051752 * A051754 A051755 A051756

nonn,more

Eric W. Weisstein

a(4) from Jud McCranie, Oct 15 2000

a(5) from Giovanni Resta, Feb 20 2009

approved