A054502 Counting sequence for classification of nonattacking queens on n X n toroidal board.

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

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 * A371335 A059346 A259439

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