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

0,9

Comments

From n = 2, run lengths of A385863.

Links

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

Mathematica

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

Crossrefs

Cf. A067175, A385863.

Sequence in context: A257023 A238894 A054740 * A272947 A177740 A118458

Adjacent sequences: A387170 A387171 A387172 * A387174 A387175 A387176

Keyword

nonn,base,easy

Author

Paolo Xausa, Aug 20 2025

Status

approved