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A097925
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Number of (n,3) Freiman-Wyner sequences.
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2
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7, 12, 23, 42, 78, 142, 262, 482, 887, 1630, 2999, 5516, 10146, 18660, 34322, 63128, 116111
(list; graph; refs; listen; history; internal format)
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OFFSET
| 4,1
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COMMENTS
| "The values for n <= 3 are straightforward."
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REFERENCES
| I. F. Blake, The enumeration of certain run length sequences, Information and Control, 55 (1982), 222-237.
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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
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CROSSREFS
| Cf. A006355, A097926.
Sequence in context: A189321 A160423 A192752 * A132195 A076852 A011996
Adjacent sequences: A097922 A097923 A097924 * A097926 A097927 A097928
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Sep 05 2004
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