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

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A182313 Primes of form a^2+b^2 such that a^4+b^4 and a^8+b^8 are primes. 2
2, 5, 17, 1277, 2129, 3413, 4157, 4637, 7481, 7573, 7717, 14561, 15233, 19469, 19889, 20549, 20693, 20749, 22721, 23609, 23869, 24841, 27701, 29629, 31153, 35869, 41081, 42209, 42577, 44417, 45233, 46061, 51613, 51713, 52069, 53197, 54493, 55589, 55921, 56489 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

PROG

(PARI) list(lim)=my(v=List([2]), t); for(a=1, sqrt(lim), forstep(b=1+a%2, min(a, sqrt(lim-a^2)), 2, if(isprime(t=a^2+b^2) && isprime(a^4+b^4) && isprime(a^8+b^8), listput(v, t)))); vecsort(Vec(v)) \\ Charles R Greathouse IV, Apr 24 2012

CROSSREFS

Subsequence of A182198.

Sequence in context: A081465 A128000 A281312 * A124374 A113617 A226069

Adjacent sequences:  A182310 A182311 A182312 * A182314 A182315 A182316

KEYWORD

nonn

AUTHOR

Thomas Ordowski, Apr 24 2012

EXTENSIONS

a(4)-a(40) from Charles R Greathouse IV, Apr 24 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 December 9 19:51 EST 2019. Contains 329879 sequences. (Running on oeis4.)