%I A013147
%S A013147 2,12,488,55552,12546944,4711567872,2650074624000,2084720933010432,
%T A013147 2185097305985613824,2943182792681798926336,
%U A013147 4953485656236312191369216,10186669183126638973192372224
%V A013147 2,-12,488,-55552,12546944,-4711567872,2650074624000,
%W A013147 -2084720933010432,2185097305985613824,-2943182792681798926336,
%X A013147 4953485656236312191369216,-10186669183126638973192372224
%N A013147 arcsinh(tanh(x)+arctan(x))=2*x-12/3!*x^3+488/5!*x^5-55552/7!*x^7...
%Y A013147 Sequence in context: A012625 A012630 A013173 this_sequence A050643 A145513 
               A002860
%Y A013147 Adjacent sequences: A013144 A013145 A013146 this_sequence A013148 A013149 
               A013150
%K A013147 sign
%O A013147 0,1
%A A013147 Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)