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

 

Logo

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A139297 2^(2p - 1)/2-1, where p is a Mersenne prime A000668(n). 3
15, 4095, 1152921504606846975 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..3.

FORMULA

a(n) = 2^(2*A000668(n)-1)/2-1 = A139296(n)-1.

CROSSREFS

Sequence in context: A198524 A208463 A172322 * A211251 A208469 A070907

Adjacent sequences:  A139294 A139295 A139296 * A139298 A139299 A139300

KEYWORD

bref,nonn

AUTHOR

Omar E. Pol, Apr 13 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified December 4 15:24 EST 2016. Contains 278750 sequences.