1,2

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

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.

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).