A103909 Coordination sequence for octagonal tiling is a(n) + A103908(n)*sqrt(2).

4, 32, -8, 24, 40, 40, -176, 444, 240, -648, 232, 508, -272, -556, 1540, 980, -3064, 1424, 812, 740, -3284, 2172, 4164, -8648, 6836, 3164, -7972, 1500, 4716, 792, -10216, 10500, 7236, -18132, 5356, 7328, 2800, -19444, 12416, 21932

Offset

1,1

Links

Table of n, a(n) for n=1..40.

M. Baake, U. Grimm, P. Repetowicz and D. Joseph, Coordination sequences and critical points, arXiv:cond-mat/9809110 [cond-mat.stat-mech], 1998; in: S. Takeuchi and T. Fujiwara, Proceedings of the 6th International Conference on Quasicrystals - Yamada Conference XLVII, World Scientific Publishing, 1998, ISBN 981-02-3343-4, pp 124-127.

M. Baake and U. Grimm, Averaged coordination numbers of planar aperiodic tilings, arXiv:math-ph/0509038, 2005; Philosophical Magazine 86 (2006) 567-572.

Crossrefs

Cf. A103908.

Sequence in context: A005828 A084764 A061789 * A309906 A196247 A196250

Adjacent sequences: A103906 A103907 A103908 * A103910 A103911 A103912

Keyword

sign

Author

Ralf Stephan, Feb 22 2005

Extensions

More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Nov 03 2006

Typo in name corrected by Michel Marcus, Jun 08 2015

Status

approved