id:A124154 - OEIS Search Results

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Numbers n such that 1 + n + n^3 + n^5 is prime.

+0
4

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 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`All numbers n have to be even, because sum of 3 odd + 1 is even and can't be prime >3`
	MATHEMATICA	`Do[If[PrimeQ[1 + n + n^3 + n^5], Print[n]], {n, 1, 300}]`
	CROSSREFS	`Cf. A049407.` `Adjacent sequences: A124151 A124152 A124153 this_sequence A124155 A124156 A124157` `Sequence in context: A034767 A005518 A014225 this_sequence A102634 A026520 A105319`
	KEYWORD	`nonn`
	AUTHOR	`Artur Jasinski (grafix(AT)csl.pl), Dec 13 2006`

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

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