1,2

Appears as an exponent in an upper bound on the number of partitions of a set into disjoint unions; related to the ASTRAL algorithm in phylogenetic reconstruction.

Table of n, a(n) for n=1..87.

Daniel Kane and Terence Tao, A bound on partitioning clusters, arXiv:1702.00912 [math.CO] (2017); submitted to Electronic Journal of Combinatorics.

1.72598245787871910871908531940620853665960266205954942767875290916035...

RealDigits[N[Log[27]/(Log[27/4]), 100]] [[1]] (* Vincenzo Librandi, Feb 24 2017 *)

(PARI) log(27)/log(27/4)

Sequence in context: A072761 A127885 A006577 * A073652 A277848 A248285

Adjacent sequences: A280231 A280232 A280233 * A280235 A280236 A280237

cons,nonn

Charles R Greathouse IV, Feb 24 2017

More digits from Jon E. Schoenfield, Mar 15 2018

approved