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A100358 Numbers n such that 2^n+n^3+1 is prime. 3
0, 2, 6, 8, 20, 38, 96, 146, 236, 458, 726, 962, 1422, 2864, 3858, 5228, 9822, 21774, 32336, 33336, 43556 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(22) > 200000. - Giovanni Resta, Mar 23 2014

a(22) > 400000. - Robert Price, Sep 01 2014

LINKS

Table of n, a(n) for n=1..21.

MAPLE

A100358:=n->`if`(isprime(2^n+n^3+1), n, NULL): seq(A100358(n), n=0..10^3); # Wesley Ivan Hurt, Sep 01 2014

MATHEMATICA

{ta={{0}}, tb={{0}}}; Do[g=n; s=2^n+n^3+1; If[PrimeQ[s], Print[n]; ta=Append[ta, n]; tb=Append[tb, s]], {n, 1, 10000}]; {ta, tb, g}

PROG

(PARI)

for(n=1, 10^5, if(ispseudoprime(2^n+n^3+1), print1(n, ", "))) \\ Derek Orr, Sep 01 2014

CROSSREFS

Cf. A001580, A069539, A100357.

Sequence in context: A093968 A064713 A162213 * A134136 A185165 A289892

Adjacent sequences:  A100355 A100356 A100357 * A100359 A100360 A100361

KEYWORD

more,nonn

AUTHOR

Labos Elemer, Nov 19 2004

EXTENSIONS

a(17)-a(21) from Giovanni Resta, Mar 23 2014

STATUS

approved

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Last modified August 14 08:08 EDT 2020. Contains 336480 sequences. (Running on oeis4.)