A242020 Smallest index at which A242018 contains a run of n consecutive 1s.

2, 4, 7, 26, 27308

Offset

1,1

Comments

a(6) has 520 decimal digits.

It is unknown whether or not this sequence is finite.

Links

Nathaniel Johnston, Table of n, a(n) for n = 1..6

MathOverflow, Do runs of every length occur in this sequence?

Programming Puzzles and Code Golf, Where are the runs in this infinite string?

Example

a(3) = 7 because A242018(7) = A242018(8) = A242018(9) = 1, and this is the first time that there are three consecutive 1s in A242018.

Crossrefs

Cf. A242018.

Sequence in context: A179386 A343977 A065846 * A047904 A102118 A102119

Adjacent sequences: A242017 A242018 A242019 * A242021 A242022 A242023

Keyword

nonn,hard,more

Author

Nathaniel Johnston, Aug 11 2014

Status

approved