Grabner, Peter A note on the parity of the sum-of-digits function. (English) Zbl 1060.11506 Sémin. Lothar. Comb. 30, B30e, 8 p. (1993). Summary: We describe the asymptotic behaviour of the parity of the sum-of-digits of integers divisible by 5. Cited in 4 Documents MSC: 11N64 Other results on the distribution of values or the characterization of arithmetic functions 11A63 Radix representation; digital problems PDFBibTeX XMLCite \textit{P. Grabner}, Sémin. Lothar. Comb. 30, B30e, 8 p. (1993; Zbl 1060.11506) Full Text: EuDML EMIS Online Encyclopedia of Integer Sequences: a(n) = Sum_{k=1..n} (-1)^A000120(3*k). a(n) = Sum_{k=1..n} (-1)^A000120(5*k).