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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A147992 Sequence S such that 1 is in S and if x is in S, then 4x-1 and 4x+1 are in S. 7
1, 3, 5, 11, 13, 19, 21, 43, 45, 51, 53, 75, 77, 83, 85, 171, 173, 179, 181, 203, 205, 211, 213, 299, 301, 307, 309, 331, 333, 339, 341, 683, 685, 691, 693, 715, 717, 723, 725, 811, 813, 819, 821, 843, 845, 851, 853, 1195, 1197, 1203, 1205, 1227, 1229, 1235 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

Does every generation after the initial 1 contain a prime?

EXAMPLE

0th generation: 1

1st generation: 3 5

2nd generation: 11 13 19 21

CROSSREFS

Sequence in context: A066587 A047621 A117205 * A166089 A136208 A045405

Adjacent sequences:  A147989 A147990 A147991 * A147993 A147994 A147995

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu), Dec 07 2008

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 14 14:07 EST 2012. Contains 205623 sequences.