A039930 Height of lattice of parameters of mixed orthogonal arrays with n runs and strength 2.

0, 1, 1, 4, 1, 3, 1, 9, 5, 3, 1, 12, 1, 3, 3, 21, 1, 10, 1, 20, 3, 3, 1, 25, 7, 3, 15, 28, 1, 5, 1, 42, 3, 3, 3

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• nice
• more

Comments

a(36) is the first unknown term.

References

• A. S. Hedayat, N. J. A. Sloane and J. Stufken, Orthogonal Arrays, Springer-Verlag, NY, 1999.

Links

• E. M. Rains, N. J. A. Sloane and J. Stufken, The Lattice of N-Run Orthogonal Arrays, J. Stat. Planning Inference, 102 (2002), 477-500 (Abstract, pdf, ps).
• Eric D. Schoen, Pieter T. Eendebak and Man V. M. Nguyen, Complete enumeration of pure-level and mixed-level orthogonal arrays, Journal of Combinatorial Designs, Volume 18, Issue 2, pages 123-140, March 2010; DOI: 10.1002/jcd.20236; Correction: Journal of Combinatorial Designs, Volume 18, Issue 6, page 488, November 2010; DOI: 10.1002/jcd.20270.

Crossrefs

Cf. A039927, A039931, A048638.