login
This site is supported by donations to The OEIS Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A152976 Denominators of the redundant Stern-Brocot structure; numerators=A152975. 3
1, 2, 3, 1, 3, 6, 3, 5, 2, 3, 1, 4, 9, 5, 10, 5, 9, 4, 7, 3, 6, 3, 5, 2, 3, 1, 5, 12, 7, 15, 8, 15, 7, 14, 7, 15, 8, 15, 7, 12, 5, 9, 4, 9, 5, 10, 5, 9, 4, 7, 3, 6, 3, 5, 2, 3, 1, 6, 15, 9, 20, 11, 21, 10, 21, 11, 24, 13, 25, 12, 21, 9, 18, 9, 21, 12, 25, 13, 24, 11, 21, 10, 21, 11, 20, 9, 15, 6 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(2^n-n+2*k) = A047679(2^(n-1)+k) for 0<=k<2^(n-1);

a(2^n-n+2*k-1) = A047679(2^(n-1)+k-1) + A047679(2^(n-1)+k) for 0<k<2^(n-1);

A060188(k+2) = Sum(a(i): 2^k <= i < 2^(k+1)).

REFERENCES

Milad Niqui, Formalising Exact Arithmetic, Ph.D. thesis, Radboud Universiteit Nijmegen, IPA Dissertation Series 2004-10, 2.6, p.65f .

LINKS

Table of n, a(n) for n=1..88.

Milad Niqui, Formalising Exact Arithmetic

CROSSREFS

Sequence in context: A283878 A086404 A192852 * A153861 A118981 A117938

Adjacent sequences:  A152973 A152974 A152975 * A152977 A152978 A152979

KEYWORD

frac,nonn,tabf

AUTHOR

Reinhard Zumkeller, Dec 22 2008

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 December 6 06:34 EST 2019. Contains 329784 sequences. (Running on oeis4.)