The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A309844 Primes of the form n^4 + n^2 + 3. 0
 3, 5, 23, 653, 10103, 83813, 160403, 234743, 280373, 1049603, 3420653, 6252503, 11319863, 52207853, 92246423, 146422103, 174913853, 221548343, 442071653, 479807123, 577224653, 607597853, 655385603, 937921253, 1222865933, 1249233683, 1387525253, 1506177293 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Digital root of all values > 3 is 5, compare A017221. LINKS MATHEMATICA f[n_] := n^4 + n^2 + 3; Select[f /@ Range[0, 200], PrimeQ] (* Amiram Eldar, Aug 24 2019 *) PROG (MATLAB) a = []; for n = 0:1e3     x = n.^4+n.^2+3;     if isprime(x); a = [a, x]; end; end (Python) from sympy import isprime a = [] for n in range(0, 1000):     x = n**4+n**2+3     if isprime(x):         a.append(x) CROSSREFS Subset of A027753. Subset of A017221. Cf. A037896, A182344, A182345, A049423. Sequence in context: A137086 A137087 A214589 * A062218 A050280 A005761 Adjacent sequences:  A309841 A309842 A309843 * A309845 A309846 A309847 KEYWORD nonn,easy AUTHOR Christopher R. Madan, Aug 19 2019 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.

Last modified January 22 10:25 EST 2020. Contains 331144 sequences. (Running on oeis4.)