%I A013567
%S A013567 1,0,1,9,54,210,510,24500,355544,3310776,7970880,511460048,
%T A013567 14772993312,247420878848,2080751146656,34093875419760,
%U A013567 2085552636479488,56037789835944320,880848150693672192
%V A013567 1,0,-1,9,-54,210,510,-24500,355544,-3310776,7970880,511460048,
%W A013567 -14772993312,247420878848,-2080751146656,-34093875419760,
%X A013567 2085552636479488,-56037789835944320,880848150693672192
%N A013567 sech(log(x+1)/exp(x))=1-1/2!*x^2+9/3!*x^3-54/4!*x^4+210/5!*x^5...
%Y A013567 Sequence in context: A093846 A152994 A034719 this_sequence A073974 A035927 
               A059597
%Y A013567 Adjacent sequences: A013564 A013565 A013566 this_sequence A013568 A013569 
               A013570
%K A013567 sign
%O A013567 0,4
%A A013567 Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)