1,2

T. D. Noe, Table of n, a(n) for n=1..1000

Select[Range[1000], GCD[#, (10^# - 1)/9] == 1&] (* Jean-François Alcover, May 19 2016 *)

Cf. A119888.

Sequence in context: A248607 A191266 A003253 * A213219 A161750 A249400

Adjacent sequences: A119902 A119903 A119904 * A119906 A119907 A119908

nice,nonn

Lekraj Beedassy, Aug 03 2006

approved