

A005633


Bishops on an n X n board (see Robinson paper for details).
(Formerly M0376)


1



0, 1, 0, 2, 2, 8, 14, 36, 112, 216, 928, 1440, 8616, 11520, 87864, 100800, 997952, 1008000, 12427904, 10886400, 169435936, 130636800, 2501216992, 1676505600, 39837528576, 23471078400, 679494214656, 348713164800, 12370158205568, 5579410636800, 239109033342848
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OFFSET

1,4


REFERENCES

R. W. Robinson, Counting arrangements of bishops, pp. 198214 of Combinatorial Mathematics IV (Adelaide 1975), Lect. Notes Math., 560 (1976). [The sequence mu(n).]
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).


LINKS

Table of n, a(n) for n=1..31.
R. W. Robinson, Counting arrangements of bishops, pp. 198214 of Combinatorial Mathematics IV (Adelaide 1975), Lect. Notes Math., 560 (1976). (Annotated scanned copy)


MAPLE

For Maple program see A005635.


CROSSREFS

Sequence in context: A045686 A045677 A280399 * A228661 A026585 A229730
Adjacent sequences: A005630 A005631 A005632 * A005634 A005635 A005636


KEYWORD

nonn


AUTHOR

N. J. A. Sloane.


EXTENSIONS

More terms from N. J. A. Sloane, Sep 28 2006


STATUS

approved



