A206707 Order of largest automorphism group of a Hadamard matrix of order 4n.

192, 21504, 190080, 10321920, 6840, 760320, 58968, 20478689280

Offset

1,1

Comments

Automorphisms are row/column permutations and negations that return the original matrix. The smallest possible order is 2.

Links

Table of n, a(n) for n=1..8.

Index entries for sequences related to Hadamard matrices

Crossrefs

Sequence in context: A338532 A035833 A048616 * A199007 A199006 A001290

Adjacent sequences: A206704 A206705 A206706 * A206708 A206709 A206710

Keyword

nonn,more

Author

Brendan McKay, Feb 11 2012

Status

approved