OFFSET
1,2
LINKS
Zak Seidov, Table of n, a(n) for n = 1..1000
EXAMPLE
20 is a term because 1 + 2*20^3 = 16001 is prime.
MAPLE
isA168550 := proc(n) isprime(1+2*n^3) ; end proc: for n from 1 to 400 do if isA168550(n) then printf("%d, ", n) ; end if; end do: # R. J. Mathar, Nov 30 2009
MATHEMATICA
Select[Range[300], PrimeQ[1+2#^3]&] (* Harvey P. Dale, Jan 13 2022 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Juri-Stepan Gerasimov, Nov 29 2009
EXTENSIONS
Terms beyond 21 from R. J. Mathar, Nov 30 2009
Example corrected by Jon E. Schoenfield, May 11 2019
STATUS
approved