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%I #15 Apr 02 2017 15:42:04
%S 0,0,1,-3,15,-80,542,-4158,37228,-374592,4237120,-53017712,729890528,
%T -10957004864,178355968576,-3129133077376,58889303575296,
%U -1183497066823680,25300855990394880,-573326855846475776
%N Expansion of log(1+x)*log(1+tan(x))/2.
%t With[{nn=20},CoefficientList[Series[Log[1+x]Log[1+Tan[x]]/2,{x,0,nn}],x] Range[0,nn]!] (* _Harvey P. Dale_, Oct 27 2011 *)
%Y Cf. A009422.
%K sign
%O 0,4
%A _R. H. Hardin_
%E Extended with signs, Mar 1997