cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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

Original entry on oeis.org

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

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Author

N. J. A. Sloane, Jul 17 2011

Keywords

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.

Crossrefs

Cf. A193176, A193179, A005848.
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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