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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A122424 Primes p such that q=4p^2 + 1 and r=4q^2 + 1 are also primes. 0
3, 13, 47, 677, 983, 1013, 1163, 1373, 1567, 1877, 2003, 2333, 2477, 2753, 3463, 4057, 4423, 4993, 7253, 9833, 10993, 11383, 13907, 15413, 15607, 17317, 18517, 19867, 20123, 20533, 20693, 21937, 24517, 24967, 25633, 26293, 28547, 28867, 29063 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

CROSSREFS

Cf. A052291 Primes p such that 4p^2 + 1 is also prime, A005574 Numbers n such that n^2 + 1 is prime.

Sequence in context: A084519 A180278 A193164 * A027326 A108946 A048482

Adjacent sequences:  A122421 A122422 A122423 * A122425 A122426 A122427

KEYWORD

nonn

AUTHOR

Zak Seidov (zakseidov(AT)yahoo.com), Oct 20 2006

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 06:09 EST 2012. Contains 205570 sequences.