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A179674 Binary sequences of length n having a conjugate at Hamming distance 2 0
0, 2, 6, 12, 30, 54, 98, 160, 234, 400, 462, 864, 806, 1722, 1530, 3328, 1938 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

J. Shallit,  Hamming distance for conjugates. Discrete Mathematics 309(12): 4197-4199 (2009)

LINKS

Table of n, a(n) for n=1..17.

EXAMPLE

For n = 3 the a(3) = 6 solutions are all 8 strings except 000, 111

CROSSREFS

Cf. A179677

Sequence in context: A081375 A024701 A224532 * A038199 A056267 A133996

Adjacent sequences:  A179671 A179672 A179673 * A179675 A179676 A179677

KEYWORD

nonn,more

AUTHOR

Jeffrey Shallit, Jan 09 2011

STATUS

approved

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Last modified October 24 05:39 EDT 2014. Contains 248500 sequences.