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Search: id:A157231
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| A157231 |
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Number of sublattices of index n fixed by a certain point group (see reference for precise definition). |
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+0
1
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| 0, 0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 2, 4, 4, 4, 3, 7, 4, 6, 6, 7, 5, 8, 6, 8, 8, 9, 6, 14
(list; graph; listen)
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OFFSET
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2,8
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REFERENCES
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John S. Rutherford, Sublattice enumeration. IV. Equivalence classes of plane sublattices by parent Patterson symmetry and colour lattice group type, Acta Cryst. (2009). A65, 156163. [See Table 5].
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CROSSREFS
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Sequence in context: A029199 A121611 A046798 this_sequence A104239 A058614 A058726
Adjacent sequences: A157228 A157229 A157230 this_sequence A157232 A157233 A157234
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Feb 25 2009
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