Journal of Integer Sequences, Vol. 16 (2013), Article 13.9.1

Relatively Prime Sets, Divisor Sums, and Partial Sums

Prapanpong Pongsriiam
Department of Mathematics, Faculty of Science
Silpakorn University
Ratchamankanai Rd., Nakornpathom
Thailand, 73000


We study the functions counting the number of certain relatively prime sets. We calculate partial sums and divisor sums of these functions. We give some open questions at the end of this article.

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(Concerned with sequences A027375 A038199 A085945 A224840.)

Received June 20 2013; revised version received September 20 2013. Published in Journal of Integer Sequences, October 13 2013.

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