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A048638 Height of lattice of parameters of mixed orthogonal arrays with 2^n runs and strength 2. 2
1, 4, 9, 21, 42, 86, 171, 358, 715, 1431 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

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)

CROSSREFS

Cf. A039930, A048164.

Sequence in context: A009911 A009887 A009914 * A144527 A117880 A027973

Adjacent sequences:  A048635 A048636 A048637 * A048639 A048640 A048641

KEYWORD

nonn,nice

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), E. M. Rains, J. Stufken

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Last modified February 15 18:22 EST 2012. Contains 205835 sequences.