The submissions stack has been unacceptably high for several months now. Please voluntarily restrict your submissions and please help with the editing. (We don't want to have to impose further limits.)
Table of n, a(n) for n=0..26.
E.g.f.: (1/Q(0)-Q(0))/2, where Q(k) = 1 - x/( 2*k+1 + x/Q(k+1) ); (continued fraction). - Sergei N. Gladkovskii, Dec 20 2013
Sinh[ Log[ 1+Tanh[ x ] ] ]
Sequence in context: A229105 A223585 A202680 * A232839 A140299 A119007
Adjacent sequences: A009567 A009568 A009569 * A009571 A009572 A009573
R. H. Hardin
Extended with signs by Olivier Gérard, Mar 15 1997