%I A013557
%S A013557 1,36,0,357,96,246862,63265,2702139,152243470,3946109992628,
%T A013557 974761022098,55898417585925641,13686533679920614,
%U A013557 2087412316757286746,370281073116766830343
%N A013557 sec(cotan(x)-cotanh(x))=1+36/2!*x^2+357/6!*x^6+96/8!*x^8...
%Y A013557 Sequence in context: A010113 A167264 A013556 this_sequence A022071 A156645 
               A037935
%Y A013557 Adjacent sequences: A013554 A013555 A013556 this_sequence A013558 A013559 
               A013560
%K A013557 nonn
%O A013557 0,2
%A A013557 Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)