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A220702 Numbers n such that n^5 + 5*n + 5^n is prime. 1
1, 2, 3, 4, 6, 19, 23, 63, 76, 508, 561, 839, 894, 1389, 2513, 3436, 6121, 7412, 8418, 9184 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..20.

MATHEMATICA

Select[Range[10000], PrimeQ[#^5 + 5*# + 5^#]&]

PROG

(PARI) is(n)=ispseudoprime(n^5+5*n+5^n) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Cf. A220511.

Sequence in context: A069860 A084391 A259383 * A217351 A274238 A115035

Adjacent sequences:  A220699 A220700 A220701 * A220703 A220704 A220705

KEYWORD

nonn

AUTHOR

Vincenzo Librandi, Jan 07 2013

STATUS

approved

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Last modified August 13 02:09 EDT 2020. Contains 336441 sequences. (Running on oeis4.)