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A213637 Values of n for which A213636(n) = 1. 4
1, 3, 4, 5, 7, 9, 10, 11, 13, 15, 16, 17, 19, 21, 22, 23, 25, 27, 28, 29, 31, 33, 34, 35, 36, 37, 39, 40, 41, 43, 45, 46, 47, 49, 51, 52, 53, 55, 57, 58, 59, 61, 63, 64, 65, 67, 69, 70, 71, 73, 75, 76, 77, 79, 81, 82, 83, 85, 87, 88, 89, 91, 93, 94, 95, 96, 97, 99 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) is the position of the n-th 1 in the sequence of remainders when each positive integer is divided by its least nondivisor (as in A007978).

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

(See A213636.)

rem[n_]:=Module[{lnd=First[Complement[Range[n], Divisors[n]]]}, Mod[n, lnd]]; Flatten[Position[Join[{1, 2}, Array[rem, 100, 3]], 1]] (* Harvey P. Dale, Feb 07 2014 *)

CROSSREFS

Sequence in context: A276155 A273670 A153329 * A047251 A258932 A183213

Adjacent sequences:  A213634 A213635 A213636 * A213638 A213639 A213640

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Jun 16 2012

STATUS

approved

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Last modified May 30 15:38 EDT 2020. Contains 334726 sequences. (Running on oeis4.)