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.

Showing 1-2 of 2 results.

A304033 Partial sums of A303981.

Original entry on oeis.org

1, 9, 25, 57, 89, 129, 177, 249, 313, 409, 489, 593, 705, 817, 945, 1097, 1257, 1401, 1561, 1729, 1921, 2137, 2313, 2521, 2745, 2977, 3233, 3473, 3745, 4009, 4265, 4561, 4865, 5201, 5489, 5801, 6153, 6473, 6889, 7201, 7585, 7977, 8329, 8761, 9161, 9617, 10017
Offset: 0

Views

Author

Rémy Sigrist, May 05 2018

Keywords

Crossrefs

Cf. A303981.

A324494 Coordination sequence for Tübingen triangle tiling.

Original entry on oeis.org

1, 10, 10, 20, 50, 30
Offset: 0

Views

Author

N. J. A. Sloane, Mar 12 2019

Keywords

Comments

Also known as the Tubingen or Tuebingen tiling. - N. J. A. Sloane, Jul 26 2019
The base point is taken to be the central point in the portion of the tiling shown in Baake et al. J. Phys. A (1997)'s Fig. 2 (left).
Note that the points at distance 2 from the base point, taken in counterclockwise order starting at the x-axis, have degrees 8, 7, 6, 8, 7, 6, 7, 8, 6, 7, so the figure does not have cyclic 5-fold symmetry (even though the initial terms are multiples of 5). There is mirror symmetry about the x-axis.
For another illustration of the central portion of the tiling, see Fig. 3 of the Baake 1997/2006 paper. - N. J. A. Sloane, Jul 26 2019

References

  • Baake, Michael. "Solution of the coincidence problem in dimensions d <= 4," in R. J. Moody, ed., The Mathematics of Long-Range Aperiodic Order, pp. 9-44, Kluwer, 1997 (First version)

Links

Crossrefs

Cf. A303981.
Showing 1-2 of 2 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.