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A145399
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Dirichlet g.f.: (1+4/2^s+1/4^s)*zeta(s)^3.
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0
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1, 7, 3, 19, 3, 21, 3, 37, 6, 21, 3, 57, 3, 21, 9, 61, 3, 42, 3, 57, 9, 21, 3, 111, 6, 21, 10, 57, 3, 63, 3, 91, 9, 21, 9, 114, 3, 21, 9, 111, 3, 63, 3, 57, 18, 21, 3, 183, 6, 42, 9, 57, 3, 70, 9, 111, 9, 21, 3, 171, 3, 21, 18, 127, 9, 63, 3, 57, 9, 63, 3, 222, 3, 21, 18, 57, 9, 63, 3, 183
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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REFERENCES
| J. S. Rutherford, The enumeration and symmetry-significant properties of derivative lattices, Acta Cryst. A48 (1992), 500-508. Table 1, symmetry Pmmm.
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PROG
| (PARI) t1=direuler(p=2, 200, 1/(1-X)^3)
t2=direuler(p=2, 2, 1+4*X+X^2, 200)
t3=dirmul(t1, t2)
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CROSSREFS
| Cf. A007425.
Sequence in context: A073337 A195159 A200943 * A160797 A050013 A161417
Adjacent sequences: A145396 A145397 A145398 * A145400 A145401 A145402
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KEYWORD
| nonn,mult
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Mar 13 2009
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