

A280234


Decimal expansion of log(27)/log(27/4).


1



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

1,2


COMMENTS

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.


LINKS

G. C. Greubel, Table of n, a(n) for n = 1..10000
Daniel Kane and Terence Tao, A bound on partitioning clusters, arXiv:1702.00912 [math.CO] (2017); submitted to Electronic Journal of Combinatorics.


EXAMPLE

1.72598245787871910871908531940620853665960266205954942767875290916035...


MATHEMATICA

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


PROG

(PARI) log(27)/log(27/4)
(MAGMA) SetDefaultRealField(RealField(100)); Log(27)/Log(27/4); // G. C. Greubel, Oct 13 2018


CROSSREFS

Cf. A016627 (log(4)), A016650 (log(27)).
Sequence in context: A072761 A127885 A006577 * A073652 A277848 A248285
Adjacent sequences: A280231 A280232 A280233 * A280235 A280236 A280237


KEYWORD

cons,nonn


AUTHOR

Charles R Greathouse IV, Feb 24 2017


EXTENSIONS

More digits from Jon E. Schoenfield, Mar 15 2018


STATUS

approved



