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Search: id:A038995
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| A038995 |
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Number of sublattices of index n in generic 8-dimensional lattice. |
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+0
3
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| 1, 255, 3280, 43435, 97656, 836400, 960800, 6347715, 8069620, 24902280, 21435888, 142466800, 67977560, 245004000, 320311680, 866251507, 435984840, 2057753100, 943531280, 4241688360, 3151424000, 5466151440
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OFFSET
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0,2
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REFERENCES
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M. Baake, "Solution of coincidence problem...", in R. V. Moody, ed., Math. of Long-Range Aperiodic Order, Kluwer 1997, pp. 9-44.
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LINKS
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Index entries for sequences related to sublattices
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FORMULA
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f(Q, n)=Sum d*f(Q-1, d), d|n; here Q=8.
Multiplicative with a(p^e) = product (p^(e+k)-1)/(p^k-1), k=1..7
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CROSSREFS
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Cf. A001001.
Sequence in context: A143035 A157778 A158010 this_sequence A068024 A028524 A075940
Adjacent sequences: A038992 A038993 A038994 this_sequence A038996 A038997 A038998
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KEYWORD
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nonn,mult
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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