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A002755
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Number of bipartite partitions of n white objects and 6 black ones.
(Formerly M4784 N2041)
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2
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11, 30, 77, 162, 323, 589, 1043, 1752, 2876, 4571, 7128, 10860, 16306, 24051, 35040, 50355, 71609, 100697, 140349, 193784, 265505, 360889, 487214, 653243, 870613, 1153322, 1519658, 1991689, 2597762, 3372107, 4358198, 5608418, 7188632
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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COMMENTS
| Number of ways to factor p^n*q^6 where p and q are distinct primes.
a(n) = if n <= 6 then A054225(6,n) else A054225(n,6). [Reinhard Zumkeller, Nov 30 2011]
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REFERENCES
| M. S. Cheema and H. Gupta, Tables of Partitions of Gaussian Integers. National Institute of Sciences of India, Mathematical Tables, Vol. 1, New Delhi, 1956, p. 1.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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CROSSREFS
| Column 6 of A054225.
Cf. A005380.
Sequence in context: A051682 A109943 A137411 * A157827 A196374 A112260
Adjacent sequences: A002752 A002753 A002754 * A002756 A002757 A002758
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| Edited by Christian G. Bower (bowerc(AT)usa.net), Jan 08 2004
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