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A097925
Number of (n,3) Freiman-Wyner sequences.
2
7, 12, 23, 42, 78, 142, 262, 482, 887, 1630, 2999, 5516, 10146, 18660, 34322, 63128, 116111
OFFSET
4,1
COMMENTS
"The values for n <= 3 are straightforward."
REFERENCES
I. F. Blake, The enumeration of certain run length sequences, Information and Control, 55 (1982), 222-237.
FORMULA
Appears to satisfy a linear recurrence with characteristic polynomial (1+x)(1+x^2)(1-x-x^2-x^3). - Ralf Stephan, Dec 04 2004
CROSSREFS
Sequence in context: A160423 A252652 A192752 * A132195 A076852 A011996
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Sep 05 2004
STATUS
approved