Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A128968
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A128968 a(n) is the n-th prime of the form x^2+n. +0
1
2, 3, 19, 53, 2309, 967, 151, 6569, 3373, 2819, 15887, 2221, 3613, 81239, 4639, 6257, 101141, 6907, 35363, 106949, 59557, 6911, 49307, 70249, 10429, 408347, 33151, 9437, 518429, 63031, 40031, 159233, 155269, 66083, 725939, 156061, 13033, 641639 (list; graph; listen)
OFFSET

1,1

EXAMPLE

a(4)=53 because 5=1^2+4,13=3^2+4, 29=5^2+4, 53=7^2+4 are prime and 53 is the 4th such prime.

CROSSREFS

Sequence in context: A135958 A051079 A051089 this_sequence A009178 A119344 A072877

Adjacent sequences: A128965 A128966 A128967 this_sequence A128969 A128970 A128971

KEYWORD

nonn

AUTHOR

John L. Drost (drost(AT)marshall.edu), Apr 28 2007

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


AT&T Labs Research