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

0, 16, 16, 4, 12, 8, 148, 288, 140, 492, 128, 320, 236, 440, -1040, -640, 2224, -948, -512, -456, 2392, -1464, -2868, 6196, -4752, -2152, 5728, -968, -3240, -460, 7328, -7320, -5008, 12936, -3672, -5064, -1856, 13876, -8652, -15376

Offset

1,2

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. A103909.

Sequence in context: A284498 A070576 A173778 * A192632 A305945 A010855

Adjacent sequences: A103905 A103906 A103907 * A103909 A103910 A103911

Keyword

sign

Author

Ralf Stephan, Feb 22 2005

Extensions

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

Status

approved