login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A046104 Denominators of convergents to the diesis log_2(5/4). 13
1, 3, 28, 59, 146, 643, 4004, 8651, 12655, 21306, 76573, 97879, 1838395, 1936274, 13456039, 15392313, 44240665, 59632978, 103873643, 475127550, 579001193, 24793177656, 149338067129, 174131244785, 845863046269, 1865857337323 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Also denominators of convergents to log_2(5), cf. A020858. Denominators of convergents to log_2(128/125), sometimes also referred to as diesis, are (1, 29, 117, 263, 643, 906, 1549, 5553, 7102, 90777, ...). - M. F. Hasler, Apr 30 2020

LINKS

Table of n, a(n) for n=1..26.

Wikipedia, Diesis.

MATHEMATICA

Denominator[ Table[ ContinuedFraction[ Log[ 5/4 ]/Log[ 2 ], i ]//Normal, {i, 30} ] ]

Denominator[Convergents[Log[2, 5/4], 30]] (* Harvey P. Dale, Jan 24 2015 *)

PROG

(PARI) contfracpnqn(contfrac(log(5)/log(2)), 99)[2, ] \\ M. F. Hasler, Apr 30 2020

CROSSREFS

Cf. A046103 (numerators corresponding to log_2(5/4)), A116985 (numerators corresponding to log_2(5)).

Sequence in context: A225674 A253653 A267360 * A116984 A229055 A061793

Adjacent sequences:  A046101 A046102 A046103 * A046105 A046106 A046107

KEYWORD

nonn,frac

AUTHOR

Eric W. Weisstein

EXTENSIONS

Name corrected and links edited by M. F. Hasler, Apr 30 2020

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 26 21:46 EDT 2020. Contains 337377 sequences. (Running on oeis4.)