%I A001226
%S A001226 1,1,3,9,7,93,315,17,3855,13797,195,182361,41943,9709,9256395,
%T A001226 34636833,31775,479349,1857283155,430185,26817356775,102280151421,
%U A001226 372827,1497207322929,89756051247,84215045,84973577874915
%N A001226 Lerch's function q_2 = (2^{phi(n)} - 1)/n, n odd.
%D A001226 L. E. Dickson, History of the Theory of Numbers. Carnegie Institute Public. 
               256, Washington, DC, Vol. 1, 1919; Vol. 2, 1920; Vol. 3, 1923, see 
               vol. 1, p. 109.
%Y A001226 Cf. A000010.
%Y A001226 Sequence in context: A010634 A146179 A137299 this_sequence A093498 A021255 
               A070342
%Y A001226 Adjacent sequences: A001223 A001224 A001225 this_sequence A001227 A001228 
               A001229
%K A001226 nonn
%O A001226 1,3
%A A001226 N. J. A. Sloane (njas(AT)research.att.com).