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Search: id:A071093
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| A071093 |
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Number of matchings in triangle graph with n nodes per side as n runs through numbers congruent to 0 or 3 mod 4. |
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+0
2
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| 1, 2, 6, 2196, 37004, 2317631400, 216893681800, 2326335506123418128, 1208982377794384163088
(list; graph; listen)
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OFFSET
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0,2
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REFERENCES
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J. Propp, Enumeration of matchings: problems and progress, pp. 255-291 in L. J. Billera et al., eds, New Perspectives in Algebraic Combinatorics, Cambridge, 1999 (see Problem 17).
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LINKS
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J. Propp, Twenty open problems in enumeration of matchings.
J. Propp, Updated article
J. Propp, Enumeration of matchings: problems and progress, in L. J. Billera et al. (eds.), New Perspectives in Algebraic Combinatorics
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CROSSREFS
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Cf. A039907.
Sequence in context: A046857 A129454 A140258 this_sequence A114045 A116899 A162146
Adjacent sequences: A071090 A071091 A071092 this_sequence A071094 A071095 A071096
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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