%I A012969
%S A012969 1,0,4,6,19,140,910,5250,39925,414360,4244200,42242750,500292775,
%T A012969 7036001700,98944220050,1395690728250,22347132003625,399376247582000,
%U A012969 7158271817183500,130527261318021750,2628975639252746875
%V A012969 1,0,4,-6,19,-140,910,-5250,39925,-414360,4244200,-42242750,
%W A012969 500292775,-7036001700,98944220050,-1395690728250,22347132003625,
%X A012969 -399376247582000,7158271817183500,-130527261318021750
%N A012969 cosh(arctan(x)+log(x+1))=1+4/2!*x^2-6/3!*x^3+19/4!*x^4-140/5!*x^5...
%Y A012969 Sequence in context: A001683 A053892 A013126 this_sequence A057789 A123169 
               A023863
%Y A012969 Adjacent sequences: A012966 A012967 A012968 this_sequence A012970 A012971 
               A012972
%K A012969 sign
%O A012969 0,3
%A A012969 Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)