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A071092 Moments of inertia of a certain configuration of hexagons. 0
1, 20, 93, 296, 725 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

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 6).

LINKS

Table of n, a(n) for n=1..5.

J. Propp, Updated article

J. Propp, Enumeration of matchings: problems and progress, in L. J. Billera et al. (eds.), New Perspectives in Algebraic Combinatorics

CROSSREFS

Sequence in context: A177291 A169711 A281391 * A144359 A124948 A126407

Adjacent sequences:  A071089 A071090 A071091 * A071093 A071094 A071095

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, May 28 2002

STATUS

approved

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Last modified September 19 13:01 EDT 2020. Contains 337178 sequences. (Running on oeis4.)