A Class of 2-(3n7, 3n−1 7, (3n−1 7−1)/2) Designs
Generalized Hadamard matrices are used for the construction of a class of quasi‐residual nonresolvable BIBD's with parameters . The designs are not embeddable as residual designs into symmetric designs if n is even. The construction yields many nonisomorphic designs for every given n ≥ 2, including more than 1017 nonisomorphic 2‐(63,21,10) designs.
Journal of Combinatorial Designs
A Class of 2-(3n7, 3n−1 7, (3n−1 7−1)/2) Designs.
Journal of Combinatorial Designs,
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