%I A012141
%S A012141 1,1,9,281,20913,2869329,613734393,185272366761,74333015297505,
%T A012141 38107181118565665,24270343990842570345,18795056467624757017785,
%U A012141 17394205995630055629900945,18964089582659357000823035505
%N A012141 tanh(arcsin(arctanh(x)))=x+1/3!*x^3+9/5!*x^5+281/7!*x^7+20913/9!*x^9...
%Y A012141 Sequence in context: A028456 A119408 A012234 this_sequence A110553 A118893 
               A078326
%Y A012141 Adjacent sequences: A012138 A012139 A012140 this_sequence A012142 A012143 
               A012144
%K A012141 nonn
%O A012141 0,3
%A A012141 Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)