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Search: id:A157223
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| A157223 |
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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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| 1, 1, 2, 2, 5, 3, 4, 5, 8, 5, 10, 6, 11, 10, 10, 8, 17, 9, 16, 14, 17, 11, 20, 14, 20, 17, 22, 14, 34
(list; graph; listen)
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OFFSET
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2,3
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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 4].
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CROSSREFS
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Sequence in context: A146316 A157495 A128134 this_sequence A130327 A151729 A088652
Adjacent sequences: A157220 A157221 A157222 this_sequence A157224 A157225 A157226
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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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