A012072 - OEIS

%I #4 Feb 24 2012 12:50:39

%S 1,1,9,249,14129,1362961,200409465,41812246345,11765081428705,

%T 4298599985014945,1980239469431883625,1123437678322006300185,

%U 769950079011855688807185,627326819278687159338591665

%N cosh(arcsin(arcsin(x)))=1+1/2!*x^2+9/4!*x^4+249/6!*x^6+14129/8!*x^8...

%K nonn

%O 0,3

%A Patrick Demichel (patrick.demichel(AT)hp.com)