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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A204990 (1/2)*(A204991). 2
1, 1, 3, 2, 15, 3, 7, 4, 63, 15, 1023, 6, 4095, 7, 15, 8, 255, 63, 262143, 30, 63, 1023, 2047, 12, 1048575, 4095, 262143, 14, 268435455, 15, 31, 16, 1023, 255, 4095, 126, 68719476735, 262143, 4095, 60, 1048575, 63, 16383, 2046, 4095, 2047 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

For a guide to related sequences, see A204892.

LINKS

Table of n, a(n) for n=1..46.

MATHEMATICA

(See the program at A204987.)

CROSSREFS

Cf. A204987, A204892, A204991.

Sequence in context: A145747 A055234 A291051 * A328282 A086485 A068310

Adjacent sequences:  A204987 A204988 A204989 * A204991 A204992 A204993

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jan 21 2012

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 October 18 07:19 EDT 2019. Contains 328146 sequences. (Running on oeis4.)