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A051255
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Number of cyclically symmetric transpose complement plane partitions.
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9
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1, 2, 11, 170, 7429, 920460, 323801820, 323674802088, 919856004546820, 7434724817843114428, 170943292930264547814443, 11183057455425265737399150652, 2081853548182272792243789109645876
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OFFSET
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0,2
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REFERENCES
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D. M. Bressoud, Proofs and Confirmations, Camb. Univ. Press, 1999; Eq. (6.15), p. 199 (corrected).
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LINKS
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Table of n, a(n) for n=0..12.
M. T. Batchelor, J. de Gier and B. Nienhuis, The quantum symmetric XXZ chain at Delta=-1/2, alternating sign matrices and plane partitions, arXiv cond-mat/0101385 (see N_8(2n))
N. T. Cameron, Random walks, trees and extensions of Riordan group techniques
I. Gessel and G. Xin, The generating function of ternary trees and continued fractions
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MAPLE
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A051255 := proc(n) local i; mul((3*i+1)*(6*i)!*(2*i)!/((4*i)!*(4*i+1)!), i=0..n-1); end;
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CROSSREFS
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Cf. A049504.
Sequence in context: A067968 A197336 A013050 * A120445 A003088 A121231
Adjacent sequences: A051252 A051253 A051254 * A051256 A051257 A051258
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KEYWORD
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nonn,nice,easy
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AUTHOR
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N. J. A. Sloane.
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EXTENSIONS
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More terms from Michel ten Voorde (seqfan(AT)tenvoorde.org)
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STATUS
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approved
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