1,1

a(n) is not 3 for n in {9, 45, 58, 89, 128, 163, 168, ...}.

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

Tímea Csajbók and János Kasza, Iterating the tau-function, Annales Univ. Sci. Budapest., Sec. Math. 35 (2011), pp. 83-93.

Cf. A200810, A200815.

Sequence in context: A032568 A053388 A091786 * A339055 A331134 A303168

Adjacent sequences: A200808 A200809 A200810 * A200812 A200813 A200814

nonn

Charles R Greathouse IV, Nov 23 2011

approved