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A059105 Number of n-dimensional torsion-free crystallographic groups with trivial center. 1
0, 0, 1, 4, 101, 5004 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..6.

W. Plesken and T. Schulz, CARAT Homepage

W. Plesken and T. Schulz, CARAT Homepage [Cached copy in pdf format (without subsidiary pages), with permission]

W. Plesken and T. Schulz, Introduction to CARAT [Cached copy in pdf format (without subsidiary pages), with permission]

CROSSREFS

Cf. A004027, A004028, A004029, A059104.

Sequence in context: A251361 A260025 A218884 * A129435 A129702 A220776

Adjacent sequences:  A059102 A059103 A059104 * A059106 A059107 A059108

KEYWORD

nonn,hard,nice,more

AUTHOR

Tilman Schulz (tilman(AT)momo.math.rwth-aachen.de), Feb 13 2001

STATUS

approved

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Last modified June 25 05:41 EDT 2019. Contains 324346 sequences. (Running on oeis4.)