%I A013144
%S A013144 2,20,1128,158112,41334912,17364051712,10697958401024,
%T A013144 9087507664709632,10179531541621604352,14538540850131730563072,
%U A013144 25785525466844174964228096,55601885971190702384095952896
%V A013144 2,-20,1128,-158112,41334912,-17364051712,10697958401024,
%W A013144 -9087507664709632,10179531541621604352,-14538540850131730563072,
%X A013144 25785525466844174964228096,-55601885971190702384095952896
%N A013144 arctan(tanh(x)+atan(x))=2*x-20/3!*x^3+1128/5!*x^5-158112/7!*x^7...
%Y A013144 Sequence in context: A008793 A015192 A012790 this_sequence A112359 A053848 
               A134476
%Y A013144 Adjacent sequences: A013141 A013142 A013143 this_sequence A013145 A013146 
               A013147
%K A013144 sign
%O A013144 0,1
%A A013144 Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)