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A305836 Numbers k such that (2^k-1)^4 + 2 is prime. 0
0, 1, 2, 4, 6, 10, 12, 30, 78, 244, 490, 760, 1808, 4790, 34330 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
a(16) > 10^5. - Robert Price, Jul 21 2018
LINKS
MATHEMATICA
Select[Range@ 2000, PrimeQ[(2^# - 1)^4 + 2] &] (* Michael De Vlieger, Jun 11 2018 *)
PROG
(PARI) is(n)=ispseudoprime((2^n-1)^4+2)
CROSSREFS
Cf. A128832 ((2^n-1)^4).
Sequence in context: A100195 A032396 A271884 * A233349 A233556 A087148
KEYWORD
nonn,more
AUTHOR
EXTENSIONS
a(14) from Vaclav Kotesovec, Jun 16 2018
a(15) from Robert Price, Jun 20 2018
STATUS
approved

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Last modified April 16 08:27 EDT 2024. Contains 371698 sequences. (Running on oeis4.)