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A001139 Number of stable feedback shift registers with n stages.
(Formerly M3088 N1252)
0
1, 3, 21, 6615, 64595475 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

REFERENCES

C. L. Liu, The Stability Problem of Several Classes of Feedback Shift-Registers in Theory of graphs: International Symposium. Held at the International Computation Center in Rome, Jul, 1966. Scientific editor, P. Rosenstiehl; Gordon and Breach, New York; Dunod, Paris 1967, xviii+416 pp. See page 238.

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=2..6.

CROSSREFS

Sequence in context: A265637 A054739 A117508 * A277628 A016449 A161377

Adjacent sequences:  A001136 A001137 A001138 * A001140 A001141 A001142

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified February 23 23:56 EST 2018. Contains 299595 sequences. (Running on oeis4.)