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A008286 Number of different parameter sets for orthogonal arrays with 2^n runs. 1
1, 2, 5, 14, 61, 320, 3037 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Number of nodes in lattice Lambda_{2^n}.

REFERENCES

Calculated by M. Colgan, E. M. Rains and N. J. A. Sloane, August 1999.

LINKS

Table of n, a(n) for n=0..6.

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. A049082.

Sequence in context: A243551 A110043 A006847 * A049082 A158095 A227365

Adjacent sequences:  A008283 A008284 A008285 * A008287 A008288 A008289

KEYWORD

nonn,nice

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified January 19 15:53 EST 2019. Contains 319307 sequences. (Running on oeis4.)