1,1

cot(atanh(x)) = 1/x - 2/3*x - 4/3*x^3/3! - 1040/63*x^5/5! -...

Numerators are in A102064.

Sequence in context: A100065 A066807 A051752 this_sequence A102074 A126227 A024189

Adjacent sequences: A102062 A102063 A102064 this_sequence A102066 A102067 A102068

nonn,frac

Ralf Stephan, Dec 28 2004