A387173 First differences of A067175.

0, 0, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 2, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 3, 2, 2, 3, 2, 2, 2, 3, 2, 2, 3, 2, 3, 2, 2, 3, 2, 3, 2, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 3, 2, 3, 2, 3, 3, 2, 3, 2, 3, 3, 2, 3, 3, 2, 3, 3, 2

Offset: 0

Author

Paolo Xausa, Aug 20 2025

Keywords

• nonn
• base
• easy
• new

Comments

From n = 2, run lengths of A385863.

Links

• Paolo Xausa, Table of n, a(n) for n = 0..10000

Crossrefs

Cf. A067175, A385863.

Programs

Mathematica

Differences[Join[{1}, IntegerLength[FoldList[Times, Prime[Range[100]]]]]]