With #34690, all the Hadamard matrices of order <=288 have been added. The next task is to implement matrices of order up to 664 (668 is the first order for which no construction is known). This will require implementing https://core.ac.uk/download/pdf/82189436.pdf, as well as adding some more data for the constructions that are already present.

Depends on #34690

CC: @dimpase

Component: combinatorics

Author: Matteo Cati

Branch/Commit: 1f624a4

Reviewer: Dima Pasechnik

Issue created by migration from https://trac.sagemath.org/ticket/34807