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On Full Orthogonal Designs in Order \(72\)

S. Georgiou1, C. Koukouvinos2, J. Seberry3
1Department of Mathematics National Technical University of Athens Zografou 15773, Athens, Greece
2 Department of Mathematics National Technical University of Athens Zografou 15773, Athens, Greece
3School of IT and Computer Science University of Wollongong Wollongong, NSW, 2522, Australia

Abstract

We find new full orthogonal designs in order 72 and show that of 2700 possible \(OD(72; s_1, s_2, s_3, 72 – s_1 – s_2 – s_3)\), 335 are known, of 432 possible \(OD(72; s_1, s_2, 72 – s_1 – s_2)\), 308 are known. All possible \(OD(72; s_1, 72 – s_1)\) are known.