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A009764
Expansion of tan(x)^2.
+0
4
0, 2, 16, 272, 7936, 353792, 22368256, 1903757312, 209865342976, 29088885112832, 4951498053124096, 1015423886506852352, 246921480190207983616, 70251601603943959887872
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Maintained by
N. J. A. Sloane
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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.
AT&T Labs Research
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