

A193175


Numbers n such that there exists a twodimensional generalized Bravais lattice with nfold symmetry.


2



4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 48, 50, 54, 60, 66, 70, 84, 90
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OFFSET

1,1


COMMENTS

The complete list of 29 terms is shown. These are the values of 2n such that A193179(n)=1.


REFERENCES

Mermin, N. David; Rokhsar, Daniel S.; and Wright, David C.; Beware of 46fold symmetry: the classification of twodimensional quasicrystallographic lattices. Phys. Rev. Lett. 58 (1987), 20992101.


LINKS

Table of n, a(n) for n=1..29.


CROSSREFS

Cf. A193176, A193179, A005848.
Sequence in context: A272651 A103517 A163300 * A093161 A111305 A284665
Adjacent sequences: A193172 A193173 A193174 * A193176 A193177 A193178


KEYWORD

nonn,fini,full


AUTHOR

N. J. A. Sloane, Jul 17 2011


STATUS

approved



