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A161889 a(1)=2. a(n) = the smallest integer > a(n-1) that is coprime to n, and is such that (a(n)-a(n-1)) is not a divisor of n. 2
2, 5, 7, 13, 16, 23, 25, 31, 35, 39, 41, 49, 51, 55, 59, 65, 67, 71, 73, 79, 83, 87, 89, 103, 106, 109, 113, 121, 123, 127, 129, 135, 137, 141, 143, 151, 153, 157, 161, 167, 169, 173, 175, 181, 187, 191, 193, 203, 205, 209, 211, 217, 219, 223, 226, 229, 233, 237 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) - a(n-1) = A161888(n).

LINKS

Table of n, a(n) for n=1..58.

CROSSREFS

Cf. A161888

Sequence in context: A284191 A065897 A293762 * A275284 A261123 A336451

Adjacent sequences:  A161886 A161887 A161888 * A161890 A161891 A161892

KEYWORD

nonn

AUTHOR

Leroy Quet, Jun 21 2009

EXTENSIONS

More terms from Sean A. Irvine, Aug 05 2010

STATUS

approved

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Last modified August 2 20:05 EDT 2021. Contains 346428 sequences. (Running on oeis4.)