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A006946 Independence number of De Bruijn graph of order n on two symbols.
(Formerly M0834)
1
1, 2, 3, 7, 13, 28, 55 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

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=1..7.

N. Lichiardopol, Independence number of de Bruijn graphs, Discrete Math., 306 (2006), no.12, 1145-1160. [Herman Jamke (hermanjamke(AT)fastmail.fm), Sep 07 2010]

Eric Weisstein's World of Mathematics, de Bruijn Graph

Eric Weisstein's World of Mathematics, Independence Number

MATHEMATICA

Length /@ Table[FindIndependentVertexSet[DeBruijnGraph[2, n]][[1]], {n, 6}]

CROSSREFS

Sequence in context: A088172 A048573 A221834 * A074129 A233042 A055003

Adjacent sequences:  A006943 A006944 A006945 * A006947 A006948 A006949

KEYWORD

nonn,more,hard

AUTHOR

N. J. A. Sloane, Herb Taylor

EXTENSIONS

a(7) from Herman Jamke (hermanjamke(AT)fastmail.fm), Sep 07 2010

STATUS

approved

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Last modified November 15 07:25 EST 2018. Contains 317225 sequences. (Running on oeis4.)