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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A139480 A000043(n) - 3. 3
0, 2, 4, 10, 14, 16, 28, 58, 86, 104, 124, 518, 604, 1276, 2200, 2278, 3214, 4250, 4420, 9686, 9938, 11210, 19934, 21698, 23206, 44494, 86240, 110500, 132046, 216088, 756836, 859430, 1257784, 1398266, 2976218, 3021374, 6972590, 13466914 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

COMMENTS

2^a(n)-1 is divisible by 3. For (2^a(n)-1)/3 see A124477.

For a(n)/2 see A139481.

LINKS

Table of n, a(n) for n=2..39.

CROSSREFS

Cf. A000043, A000668, A124477, A139479, A139481.

Sequence in context: A057283 A308987 A107992 * A227388 A152749 A081115

Adjacent sequences:  A139477 A139478 A139479 * A139481 A139482 A139483

KEYWORD

nonn

AUTHOR

Artur Jasinski, Apr 22 2008

EXTENSIONS

Definition corrected by Omar E. Pol, May 23 2008

Edited by N. J. A. Sloane, May 23 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 November 14 22:32 EST 2019. Contains 329134 sequences. (Running on oeis4.)