1,4

This sequence tends to infinity as n tends to infinity.

This sequence is similar to A282630; here we consider the greatest prime factor of a number, there we consider its least prime factor.

Rémy Sigrist, Table of n, a(n) for n = 1..10000

Rémy Sigrist, Illustration of the first terms

Rémy Sigrist, Scatterplot of the ordinal transform of the first million terms

(PARI) a = vector(100); for (n=1, #a, if (n>1, my (f=factor(n)); a[n] = 1 + a[n - primepi(f[#f~, 1])]); print1 (a[n] ", "))

Cf. A061395, A282630.

Sequence in context: A126071 A217865 A185166 * A211100 A105264 A063787

Adjacent sequences: A276552 A276553 A276554 * A276556 A276557 A276558

nonn

Rémy Sigrist, Apr 10 2017

approved