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

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A088697 Replace 0 with 10 in binary representation of n. 3
0, 1, 6, 3, 26, 13, 14, 7, 106, 53, 54, 27, 58, 29, 30, 15, 426, 213, 214, 107, 218, 109, 110, 55, 234, 117, 118, 59, 122, 61, 62, 31, 1706, 853, 854, 427, 858, 429, 430, 215, 874, 437, 438, 219, 442, 221, 222, 111, 938, 469, 470, 235, 474, 237 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Rémy Sigrist, Table of n, a(n) for n = 0..8192

FORMULA

a(0)=0, a(2n) = 4a(n) + 2, a(2n+1) = 2a(n) + 1.

EXAMPLE

n=9: 1001 -> 110101 = 53, so a(9) = 53.

PROG

(PARI) a(n)=if(n<1, 0, if(n%2==0, 4*a(n/2)+2, 2*a((n-1)/2)+1))

CROSSREFS

Cf. A084471, A048678, A088698.

Sequence in context: A288331 A288202 A294032 * A039631 A287510 A282418

Adjacent sequences:  A088694 A088695 A088696 * A088698 A088699 A088700

KEYWORD

nonn,easy,base

AUTHOR

Ralf Stephan, Oct 07 2003

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 17 15:12 EST 2020. Contains 330958 sequences. (Running on oeis4.)