1,2

Table of n, a(n) for n=1..5.

A000005(a(n)) = a(n-1) + 2 for n >= 2.

a(4) = 192 = the smallest number with 12 + 2 = 14 divisors.

Cf. A014221, A175719, A175720.

Sequence in context: A222393 A213143 A173603 * A076030 A202859 A131491

Adjacent sequences: A175715 A175716 A175717 * A175719 A175720 A175721

nonn

Jaroslav Krizek, Aug 15 2010

approved