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A199476
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Triangle read by rows: number of inequivalent classes of true tripartite entanglement systems of type 2 X M X N, for 2 <= N <= M.
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1
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2, 2, 6, 1, 5, 16, 1, 2, 12, 34, 1, 1, 6, 28, 77, 1, 1, 2, 14, 61, 157, 1, 1, 1, 6, 34, 133, 328, 1, 1, 1, 2, 15, 74, 277, 655, 1, 1, 1, 1, 6, 36, 165, 572, 1309
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OFFSET
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2,1
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REFERENCES
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XiKun Li, JunLi Li, Bin Liu and CongFeng Qiao, The parametric symmetry and numbers of the entangled class of 2 × M × N system, SCIENCE CHINA PHYSICS, MECHANICS & ASTRONOMY, Volume 54, Number 8, 1471-1475, DOI: 10.1007/s11433-011-4395-9; http://www.springerlink.com/content/24g51u87527017u7/
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LINKS
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Table of n, a(n) for n=2..46.
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EXAMPLE
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Triangle begins:
2
2 6
1 5 16
1 2 12 34
1 1 6 28 77
1 1 2 14 61 157
1 1 1 6 34 133 328
1 1 1 2 15 74 277 655
1 1 1 1 6 36 165 572 1309
...
This may also be regarded as a square array, allowing values on N >= M, in which case it begins like this:
2 2 1 1 1 1 1 1 1 ...
2 6 5 2 1 1 1 1 1 ...
1 5 16 12 6 2 1 1 1 ...
1 2 12 34 28 14 6 2 1 ...
1 1 6 28 77 61 34 15 6 ...
1 1 2 14 61 157 133 74 36 ...
1 1 1 6 34 133 328 277 165 ...
1 1 1 2 15 74 277 655 572 ...
1 1 1 1 6 36 165 572 1309 ...
...
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CROSSREFS
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Cf. A199477.
Sequence in context: A047916 A101207 A186435 * A209124 A155818 A010245
Adjacent sequences: A199473 A199474 A199475 * A199477 A199478 A199479
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KEYWORD
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nonn,tabl
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AUTHOR
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N. J. A. Sloane, Nov 06 2011
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STATUS
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approved
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