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A054502 Counting sequence for classification of nonattacking queens on n X n toroidal board. 2
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; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..32.

CROSSREFS

See comments and references for A054500.

Cf. A054500, A054501, A053994, A007705, A006841.

Sequence in context: A224926 A117673 A107946 * A059346 A259439 A274491

Adjacent sequences:  A054499 A054500 A054501 * A054503 A054504 A054505

KEYWORD

nonn,nice,hard

AUTHOR

Matthias Engelhardt

EXTENSIONS

More terms from Matthias Engelhardt, Jan 11 2001

STATUS

approved

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Last modified December 5 10:45 EST 2019. Contains 329751 sequences. (Running on oeis4.)