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A171247 Numbers n such that 1+20^n+200^n is prime. 0
0, 19, 59, 291, 327, 3951 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
COMMENTS
No more terms up to n=6900.
LINKS
PROG
(PARI) is(n)=ispseudoprime(1+20^n+200^n) \\ Charles R Greathouse IV, Jun 13 2017
CROSSREFS
Sequence in context: A236462 A139981 A235705 * A270818 A206426 A211145
KEYWORD
nonn
AUTHOR
Jason Earls, Dec 06 2009
STATUS
approved

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Last modified March 29 08:01 EDT 2024. Contains 371265 sequences. (Running on oeis4.)