%I A012509
%S A012509 4,32,544,15872,707584,44736512,3807514624,419730685952,
%T A012509 58177770225664,9902996106248192,2030847773013704704,
%U A012509 493842960380415967232,140503203207887919775744
%N A012509 log(cos(x)*cos(x))=-4/4!*x^4-32/6!*x^6-544/8!*x^8-15872/10!*x^10...
%C A012509 a(n) = 2*A000182(n+2).
%Y A012509 Sequence in context: A036442 A127945 A086899 this_sequence A013041 A006024 
               A118995
%Y A012509 Adjacent sequences: A012506 A012507 A012508 this_sequence A012510 A012511 
               A012512
%K A012509 nonn
%O A012509 0,1
%A A012509 Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)