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A009719
Expansion of tan(tanh(x))/cos(x).
+0
1
1, 3, 17, 371, 11329, 398211, 31717649, 2487281075, 257775723265, 40422383525763, 6249491749613201, 1324448178268807283, 327217658581539104833, 91010297536273890164739
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.
AT&T Labs Research
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