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 A083235 First differences of A063742, the possible values for cototients. 1
 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,10 COMMENTS Differences between consecutive numbers in the range of A051853. LINKS FORMULA a(n) = A063742(n+1) - A063742(n). EXAMPLE First missing number in A063742 is 10=A005278[1], so a[10]=2 is the first difference here > 1. MATHEMATICA t0[x_] := Table[j, {j, 1, x}] t=Table[w-EulerPhi[w], {w, 1, 10000}]; u=Union[%]; Delete[u-RotateRight[u], 1] CROSSREFS Sequence in context: A043288 A353786 A057523 * A307609 A043287 A212177 Adjacent sequences:  A083232 A083233 A083234 * A083236 A083237 A083238 KEYWORD nonn AUTHOR Labos Elemer, May 20 2003 EXTENSIONS Edited by N. J. A. Sloane at the suggestion of Andrew S. Plewe, Jun 23 2007 STATUS approved

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Last modified August 15 02:47 EDT 2022. Contains 356122 sequences. (Running on oeis4.)