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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A174819 Primes of form n^4 + n^2 - 1. 1
19, 89, 271, 4159, 10099, 20879, 28729, 38611, 50849, 130681, 391249, 457651, 1049599, 1187009, 1501849, 1875529, 3113459, 3420649, 3750031, 4102649, 6767801, 7893289, 9837631, 10559249, 11319859, 14780179, 17854849, 21385999, 31646249 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Primes of the form A071253(n) - 1. - Altug Alkan, Mar 24 2017

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

EXAMPLE

a(2) = 89 is in the sequence because 3^4 + 3^2 - 1 = 89 is prime.

MAPLE

select(isprime, [seq(n^4+n^2-1, n=1..1000)]); # Robert Israel, Mar 24 2017

MATHEMATICA

a={}; Do[p=n^4+n^2-1; If[PrimeQ[p], AppendTo[a, p]], {n, 10^2}]; Print[a];

PROG

(PARI) for(n=1, 1e3, if(isprime(p=n^4+n^2-1), print1(p ", "))) \\ Altug Alkan, Mar 24 2017

CROSSREFS

Cf. A071253.

Sequence in context: A183623 A039454 A142089 * A124947 A126406 A201306

Adjacent sequences:  A174816 A174817 A174818 * A174820 A174821 A174822

KEYWORD

nonn

AUTHOR

Michel Lagneau, Dec 01 2010

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 October 20 20:24 EDT 2019. Contains 328273 sequences. (Running on oeis4.)