A193175 Numbers n such that there exists a two-dimensional generalized Bravais lattice with n-fold symmetry.

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

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 46-fold symmetry: the classification of two-dimensional quasicrystallographic lattices. Phys. Rev. Lett. 58 (1987), 2099-2101.

Links

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

Crossrefs

Cf. A193176, A193179, A005848.

Sequence in context: A272651 A103517 A163300 * A093161 A307782 A325038

Adjacent sequences: A193172 A193173 A193174 * A193176 A193177 A193178

Keyword

nonn,fini,full

Author

N. J. A. Sloane, Jul 17 2011

Status

approved