The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A122965 a(0)=0, a(1)=1; at n>1 a(n) = a(n-1) + (sum of numbers
 0, 1, 2, 5, 6, 9, 15, 29, 35, 43, 53, 76, 82, 105, 120, 123, 153, 191, 197, 235, 245, 253, 283, 321, 327, 345, 375, 383, 413, 451, 481, 548, 607, 644, 703, 750, 820, 922, 1016, 1088, 1127, 1229, 1264, 1366, 1503, 1578, 1715, 1860, 1973, 2083, 2165, 2280, 2417 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS MATHEMATICA s={0, 1}; b=1; Do[b=b+Total[Select[Range[n-1], GCD[ #1, n]==1&&MemberQ[s, #1]&]]; AppendTo[s, b], {n, 2, 100}]; s CROSSREFS Cf. A122847. Sequence in context: A326118 A301791 A051677 * A350988 A226810 A054463 Adjacent sequences: A122962 A122963 A122964 * A122966 A122967 A122968 KEYWORD nonn AUTHOR Zak Seidov, Oct 27 2006 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified November 27 22:56 EST 2022. Contains 358406 sequences. (Running on oeis4.)