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A013148 tanh(tanh(x)+arctan(x))=2*x-20/3!*x^3+872/5!*x^5-82848/7!*x^7... 0
2, -20, 872, -82848, 13615232, -3427600128, 1224824628224, -589372636243968, 367372633732907008, -287938978919399424000, 277156456747324043952128, -321405895510495023427223552 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

CROSSREFS

Sequence in context: A168407 A163594 A193483 * A006547 A135757 A158843

Adjacent sequences:  A013145 A013146 A013147 * A013149 A013150 A013151

KEYWORD

sign

AUTHOR

Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)

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Last modified February 13 19:38 EST 2012. Contains 205536 sequences.