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A157224
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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
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1, 2, 3, 2, 6, 4, 6, 6, 8, 6, 12, 6, 12, 12, 12, 8, 18, 10, 18, 16, 18, 12, 24, 14, 20, 18, 24, 14, 36
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OFFSET
| 2,2
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REFERENCES
| 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 4].
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CROSSREFS
| Sequence in context: A134060 A197289 A161888 * A097914 A113710 A054126
Adjacent sequences: A157221 A157222 A157223 * A157225 A157226 A157227
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Feb 25 2009
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