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 A126915 Numbers n such that 1 + n^2 + n^4 + n^6 + n^8 + n^10 + n^12 + n^14 + n^16 + n^18 + n^20 + n^21 is prime. 0
 2, 6, 12, 60, 68, 138, 270, 446, 488, 620, 656, 798, 872, 942, 950, 1136, 1140, 1256, 1400, 1418, 1506, 1638, 1776, 1922, 1992, 2070, 2082, 2096, 2220, 2346, 2462, 2580, 2606, 2916 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS MATHEMATICA a = {}; Do[If[PrimeQ[1 + n^2 + n^4 + n^6 + n^8 + n^10 + n^12 + n^14 + n^16 + n^18 + n^20 + n^21], AppendTo[a, n]], {n, 1, 1400}]; a CROSSREFS Cf. A049407, A124175 A124176 A124177, A124178, A124179, A124180, A124181, A126908-A126916. Sequence in context: A109935 A065887 A072181 * A002201 A004490 A224078 Adjacent sequences:  A126912 A126913 A126914 * A126916 A126917 A126918 KEYWORD nonn AUTHOR Artur Jasinski, Dec 31 2006 STATUS approved

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Last modified May 24 07:09 EDT 2013. Contains 225617 sequences.