login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A076784 Let u(1)=u(2)=u(3)=1, u(n)=(2^floor(u(n-1)/2)+2^floor(u(n-2)/2)+1)/u(n-3) then a(n) = numerator of u(n). 1
1, 1, 1, 3, 4, 7, 13, 13, 1, 12, 12, 3, 13, 91, 13, 3, 12, 12, 1, 13, 13, 7, 4, 3, 1, 1, 1, 3, 4, 7, 13, 13, 1, 12, 12, 3, 13, 91, 13, 3, 12, 12, 1, 13, 13, 7, 4, 3, 1, 1, 1, 3, 4, 7, 13, 13, 1, 12, 12, 3, 13, 91, 13, 3, 12, 12, 1, 13, 13, 7, 4, 3, 1, 1, 1, 3, 4, 7, 13, 13, 1, 12, 12, 3, 13 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Sequence is 24-periodic

LINKS

Table of n, a(n) for n=1..85.

FORMULA

Period is (1, 1, 1, 3, 4, 7, 13, 13, 1, 12, 12, 3, 13, 91, 13, 3, 12, 12, 1, 13, 13, 7, 4, 3)

MATHEMATICA

PadRight[{}, 120, {1, 1, 1, 3, 4, 7, 13, 13, 1, 12, 12, 3, 13, 91, 13, 3, 12, 12, 1, 13, 13, 7, 4, 3}] (* Harvey P. Dale, May 27 2018 *)

CROSSREFS

Cf. A076785.

Sequence in context: A231337 A049930 A102938 * A279815 A088764 A093124

Adjacent sequences:  A076781 A076782 A076783 * A076785 A076786 A076787

KEYWORD

frac,nonn

AUTHOR

Benoit Cloitre, Nov 24 2002

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 January 21 00:46 EST 2022. Contains 350473 sequences. (Running on oeis4.)