A391293 Decimal expansion of 2^(12/7).

3, 2, 8, 1, 3, 4, 1, 4, 2, 4, 0, 3, 0, 5, 5, 1, 7, 2, 4, 6, 8, 1, 1, 3, 8, 7, 3, 1, 4, 6, 9, 9, 8, 4, 1, 9, 9, 5, 7, 8, 8, 0, 9, 8, 3, 0, 6, 1, 2, 0, 5, 0, 4, 9, 3, 1, 9, 6, 7, 6, 7, 2, 5, 3, 9, 8, 0, 0, 6, 1, 6, 0, 6, 9, 0, 6, 2, 0, 8, 8, 0, 8, 6, 2, 6, 9, 2, 3, 0, 1, 0, 0, 5, 6, 2, 1, 7, 7, 9, 8

Offset

1,1

Comments

This constant gives a lower bound of lim_{k->oo} R(3,k)^(1/k), where R = A000791.

Links

Table of n, a(n) for n=1..100.

Anurag Bishnoi, Wouter Cames van Batenburg, and Ananthakrishnan Ravi, The chromatic number of finite projective spaces, arXiv:2512.01760 [math.CO], 2025. See p. 13.

Formula

Equals 4/A011186.

Example

3.28134142403055172468113873146998419957880983...

Mathematica

RealDigits[2^(12/7), 10, 100][[1]]

Crossrefs

Cf. A000791, A011186.

Sequence in context: A391291 A224234 A305368 * A197412 A275373 A113794

Adjacent sequences: A391290 A391291 A391292 * A391294 A391295 A391296

Keyword

nonn,cons,easy

Author

Stefano Spezia, Dec 05 2025

Status

approved