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Search: id:A124154
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| A124154 |
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Numbers n such that 1 + n + n^3 + n^5 is prime. |
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+0
4
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| 2, 4, 8, 20, 22, 32, 36, 50, 54, 62, 64, 72, 78, 84, 86, 90, 92, 94, 96, 98, 112, 124, 134, 144, 146, 216, 224, 238, 240, 246, 250, 256, 262, 276, 294, 296, 298, 300, 314, 334, 370, 378, 382, 392, 400, 402, 406, 420, 430, 450, 472, 480, 482, 494, 510, 512, 526
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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All numbers n have to be even, because sum of 3 odd + 1 is even and can't be prime >3
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MATHEMATICA
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Do[If[PrimeQ[1 + n + n^3 + n^5], Print[n]], {n, 1, 300}]
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PROGRAM
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(PARI) forstep(n=2, 1000, 2, if(isprime(1 + n + n^3 + n^5), print1(n", "))) [From Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), Apr 09 2009]
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CROSSREFS
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Cf. A049407.
Sequence in context: A034767 A005518 A014225 this_sequence A102634 A026520 A105319
Adjacent sequences: A124151 A124152 A124153 this_sequence A124155 A124156 A124157
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KEYWORD
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nonn,easy
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Dec 13 2006
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EXTENSIONS
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More terms from Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), Apr 09 2009
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