1,1

Complement of A175088.

Union of A000040 (primes) and A175090. [Jaroslav Krizek, Feb 05 2010]

Numbers m such that A121559(m) = 0. - Michel Marcus, Aug 22 2014

Table of n, a(n) for n=1..66.

Iteration procedure for a(3) = 5: 5 mod 5 = 0.

Iteration procedure for a(5) = 9: 9 mod 7 = 2, 2 mod 2 = 0.

Cf. A007917 and A064722 (both for the iterations).

Sequence in context: A341518 A325600 A195921 * A047489 A196499 A035061

Adjacent sequences: A175086 A175087 A175088 * A175090 A175091 A175092

nonn

Jaroslav Krizek, Jan 28 2010

More terms from Michel Marcus, Aug 22 2014

approved