The following is a Hadamard matrix of order 4·63 = 252 constructed from a new set of Williamson matrices of order 63 found by MathCheck. The coloured squares represent one and the white squares represent negative one and each Williamson matrix is highlighted using a different colour. The colour scheme based on the one used in NASA's construction of a Hadamard matrix of order 4·23 = 92 using Williamson matrices of order 23.
