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A054502
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Counting sequence for classification of nonattacking queens on n X n toroidal board.
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2
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1, 1, 1, 2, 1, 2, 3, 5, 1, 3, 23, 30, 40, 4, 132, 218, 5, 1859, 29517, 1, 2, 9, 18, 51, 470, 7170, 387830, 1, 6, 1215, 121487, 89997968
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,4
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CROSSREFS
| See comments and references for A054500.
Cf. A054500, A054501, A053994, A007705, A006841.
Sequence in context: A081664 A117673 A107946 * A059346 A076492 A127462
Adjacent sequences: A054499 A054500 A054501 * A054503 A054504 A054505
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KEYWORD
| nonn,nice,hard
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AUTHOR
| Matthias Engelhardt (Matthias.R.Engelhardt(AT)web.de, Apr 10, 2000)
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EXTENSIONS
| More terms from Matthias Engelhardt (Matthias.R.Engelhardt(AT)web.de), Jan 11 2001
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