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, 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

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