A185660 Numbers k such that (k^3 + 11*k) +/-1 is a twin prime pair.
1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 13, 15, 16, 17, 20, 22, 37, 44, 46, 48, 52, 57, 61, 63, 68, 69, 70, 72, 81, 84, 86, 94, 96, 99, 101, 106, 108, 112, 117, 123, 124, 134, 138, 162, 178, 189, 191, 193, 200, 202, 206, 223, 224, 229, 260, 264, 271, 279, 282, 294, 297
Offset: 1
Keywords
Examples
For k=9, the corresponding twin prime pair is {827, 829}.
Links
- G. C. Greubel, Table of n, a(n) for n = 1..5000
- Prime curio for 829
Programs
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Mathematica
Select[Range[300], PrimeQ[#^3 + 11# - 1] && PrimeQ[#^3 + 11# + 1] &] Select[Range[300],AllTrue[#^3+11#+{1,-1},PrimeQ]&] (* The program uses the AllTrue function from Mathematica version 10 *) (* Harvey P. Dale, Nov 28 2014 *)