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A051570
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Consider the problem of placing N queens on an n X n board so that each queen attacks precisely k others. Here k=3 and sequence gives number of different solutions when N takes its maximal value.
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1
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OFFSET
| 3,1
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COMMENTS
| I would also like to get the sequences that give the maximal values of N.
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REFERENCES
| M. Gardner, The Last Recreations, Springer, 1997, p. 282.
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CROSSREFS
| Cf. A051567-A051571, A051754-A051759, A019654.
Sequence in context: A051569 A087186 A051759 * A082913 A083205 A019542
Adjacent sequences: A051567 A051568 A051569 * A051571 A051572 A051573
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KEYWORD
| nonn,nice,more
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
| I am not certain this description is correct, nor how rigorous the results are.
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