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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A053704 Prime powers p^w such that p^w-2 is prime. 1
4, 9, 25, 49, 81, 169, 243, 361, 729, 841, 1369, 1849, 2209, 2401, 3721, 5041, 6859, 7921, 10609, 11449, 14641, 16129, 17161, 19321, 19683, 28561, 29791, 29929, 36481, 44521, 49729, 50653, 54289, 57121, 66049, 85849, 97969, 113569, 128881 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

FORMULA

A025475(n) - 2 is prime

EXAMPLE

4 is here since 4-2=2, 243=3^5 is here because 241 is prime

CROSSREFS

A025475.

Sequence in context: A194269 A130283 A065739 * A182988 A158144 A158145

Adjacent sequences:  A053701 A053702 A053703 * A053705 A053706 A053707

KEYWORD

nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu), Feb 14 2000

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 17 16:49 EST 2012. Contains 206058 sequences.