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0, 2, 24, 182, 1200, 7502, 45864, 277622, 1672800, 10057502, 60406104, 362617862, 2176246800, 13059091502, 78359364744, 470170602902, 2821066795200, 16926530173502, 101559568985784, 609358577224742, 3656154952230000
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| a(n) = A000225(n) * A024023(n) = (2^n - 1) * (3^n - 1) . a(n) is the number of n-tuples of elements e_1,e_2,...,e_n in the cyclic group C_6 such that the subgroup generated by e_1,e_2,...,e_n is C_6 . - Sharon Sela (sharonsela(AT)hotmail.com), Jun 02 2002
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REFERENCES
| L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 199, #3.
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..300
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MATHEMATICA
| Table[(2^n-1)*(3^n-1), {n, 0, 5!}] [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Apr 28 2010]
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PROG
| (MAGMA) [(2^n-1)*(3^n-1): n in [0..30]]; // Vincenzo Librandi, Jun 05 2011
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CROSSREFS
| Cf. A000225, A024023.
Sequence in context: A073066 A002736 A131972 * A126190 A121356 A052780
Adjacent sequences: A059384 A059385 A059386 * A059388 A059389 A059390
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Jan 29 2001
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