

A309207


Continued fraction expansion of (3 tanh (3 tanh (3 tanh (...)))).


2



2, 1, 64, 2, 1, 1, 1, 3, 4, 1, 2, 3, 1, 272213, 1, 2, 1, 16, 110, 4, 4, 4, 1, 1, 1, 4, 1, 1, 916, 21, 11, 6, 2, 2, 2, 1, 2, 16, 3, 1, 1, 2, 2, 9, 1, 2, 8, 2, 4, 3, 2, 2, 1, 9, 6, 5, 3, 1, 4, 2, 12, 17, 1, 3, 1, 3, 1, 1, 3, 1, 7, 1, 1, 2, 8, 2, 1, 1, 5, 11, 90, 1
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OFFSET

0,1


COMMENTS

This is the continued fraction expansion of the constant defined in A309211.


LINKS

Table of n, a(n) for n=0..81.
W. M. Gosper, Material from Bill Gosper's Computers & Math talk, M.I.T., 1989, i+38+1 pages, annotated and scanned, included with the author's permission. (There are many blank pages because about half of the original pages were twosided, half were onesided.)


MATHEMATICA

ContinuedFraction[Reduce[x == 3 Tanh@x, x, Reals][[3, 2]], 33] (* Bill Gosper, Jul 30 2019 *)


CROSSREFS

Cf. A309208, A309211.
Sequence in context: A271442 A092650 A221194 * A104024 A233472 A284596
Adjacent sequences: A309204 A309205 A309206 * A309208 A309209 A309210


KEYWORD

nonn,cofr


AUTHOR

N. J. A. Sloane, Jul 29 2019


EXTENSIONS

More terms from Daniel Suteu, Jul 30 2019


STATUS

approved



