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 A271143 Numbers k such that 42*k^3 + 270*k^2 - 26436*k + 250703 is prime. 12
 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 41, 43, 44, 48, 51, 54, 55, 56, 58, 61, 62, 63, 64, 65, 66, 67, 69, 71, 76, 78, 79, 84, 87, 88, 89, 90, 92 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS 40 is the first value not in the sequence. LINKS Robert Price, Table of n, a(n) for n = 1..3092 Eric Weisstein's World of Mathematics, Prime-Generating Polynomials EXAMPLE 4 is in this sequence since 42*4^3 + 270*4^2 - 26436*4 + 250703 = 151967, which is prime. MATHEMATICA Select[Range[0, 100], PrimeQ[42#^3 + 270#^2 - 26436# + 250703] &] PROG (PARI) is(n)=isprime(42*n^3+270*n^2-26436*n+250703) \\ Charles R Greathouse IV, Feb 17 2017 CROSSREFS Cf. A050265-A050268, A005846, A007641, A007635, A048988, A256585, A271980, A272074, A272075, A272160, A271144. Sequence in context: A267069 A083243 A002837 * A056561 A321993 A236674 Adjacent sequences:  A271140 A271141 A271142 * A271144 A271145 A271146 KEYWORD nonn AUTHOR Robert Price, Apr 23 2016 STATUS approved

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Last modified April 14 20:23 EDT 2021. Contains 342962 sequences. (Running on oeis4.)