

A071098


Number of ways to tile 4n X 4n square with n squares removed with dominoes.


0




OFFSET

1,1


REFERENCES

J. Propp, Enumeration of matchings: problems and progress, pp. 255291 in L. J. Billera et al., eds, New Perspectives in Algebraic Combinatorics, Cambridge, 1999 (see Problem 10).


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: A013762 A078352 A215577 * A259164 A013808 A115479
Adjacent sequences: A071095 A071096 A071097 * A071099 A071100 A071101


KEYWORD

nonn


AUTHOR

N. J. A. Sloane, May 28 2002


STATUS

approved



