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A141582
a(n)= number of ways to dispose two pawns on a chessboard of size n X n (two dispositions are equivalent if one can be rotated or reflected to give the other one).
+0
1
2, 8, 21, 48, 93, 168, 278, 440, 660, 960, 1347, 1848, 2471, 3248, 4188, 5328, 6678, 8280, 10145, 12320, 14817, 17688, 20946, 24648, 28808, 33488, 38403, 44520, 50955, 58080, 65912, 74528, 83946, 94248
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified December 5 23:38 EST 2009. Contains 170428 sequences.
AT&T Labs Research
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