|
| |
|
|
A039931
|
|
Number of different sets of parameters for mixed orthogonal arrays with n runs and strength 2.
|
|
2
| |
|
|
1, 2, 2, 5, 2, 5, 2, 14, 6, 5, 2, 23, 2, 5, 5, 61, 2, 26, 2, 35, 5, 5, 2
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,2
|
|
|
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)
|
|
|
EXAMPLE
| For 12 runs there are 23 different sets of parameters: 12^1, 2^k with 1<=k<=11, 3^1*2^k with 0<=k<=4, 6^1*2^k with 0<=k<=2, 4^1*3^1, 4^1 and 1^1.
|
|
|
CROSSREFS
| Cf. A039927, A039930.
Sequence in context: A004543 A153078 A076200 * A128645 A007610 A068066
Adjacent sequences: A039928 A039929 A039930 * A039932 A039933 A039934
|
|
|
KEYWORD
| nonn,nice,more
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
|
|
|
EXTENSIONS
| a(24) is the first unknown term.
|
| |
|
|
