A383194 The least number of times that b(k) = 2*k - 1 for the first n terms of a "mean-central" sequence, as is defined in A383192.

1, 1, 2, 2, 3, 4, 4, 4, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 10, 10, 10, 10, 10, 11, 11

Offset

1,3

Comments

Problem 2 of the 2025 European Girls' Mathematical Olympiad implies that a(n) -> oo as n -> oo.

Links

Table of n, a(n) for n=1..30.

Art of Problem Solving, European Girls' Mathematical Olympiad 2025 Problem 2

Yifan Xie, Python program

Crossrefs

Cf. A383192, A383193.

Sequence in context: A029134 A303997 A276646 * A029130 A389784 A081611

Adjacent sequences: A383191 A383192 A383193 * A383195 A383196 A383197

Keyword

nonn,more

Author

Yifan Xie, Apr 21 2025

Status

approved