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A003213 Number of ways to quarter a 2n X 2n chessboard.
(Formerly M3987)
+0
4
1, 5, 37, 782, 44240 (list; graph; listen)
OFFSET

1,2

REFERENCES

M. Gardner, The Unexpected Hanging and Other Mathematical Diversions. Simon and Schuster, NY, 1969, p. 189.

T. R. Parkin, personal communication.

Popular Computing, Vol. 1 (No. 7, 1973), front cover and page 2.

LINKS

Illustration showing that a(3) = 37.

CROSSREFS

Bisection of A006067. Cf. A064941.

Adjacent sequences: A003210 A003211 A003212 this_sequence A003214 A003215 A003216

Sequence in context: A095957 A121834 A083846 this_sequence A090439 A089795 A081971

KEYWORD

nonn,nice

AUTHOR

njas

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Last modified January 7 17:16 EST 2009. Contains 152824 sequences.


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