1,2

R. L. E. Schwarzenberger, Crystallography in spaces of arbitrary dimension, Proc. Camb. Phil. Soc., 76 (1974), 23-32.

R. L. E. Schwarzenberger, $N$-Dimensional Crystallography. Pitman, London, 1980, p. 65.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Sequence in context: A126137 A085294 A034340 this_sequence A034341 A034342 A034343

Adjacent sequences: A007666 A007667 A007668 this_sequence A007670 A007671 A007672

nonn

N. J. A. Sloane (njas(AT)research.att.com).