A089678 - OEIS

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A089678

Numbers n such that n^n + n! + n^2 + 1 is prime.

2, 3, 5, 1608 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`The prime corresponding to a(4) is a 5156-digit prime.`
	MATHEMATICA	`v={}; Do[If[PrimeQ[n^n + n! + n*n + n/n], v=Append[v, n]; Print[v]], {n, 3250}]`
	CROSSREFS	`Cf. A084914, A084852.` `Sequence in context: A046474 A056146 A115835 * A072712 A046476 A175309` `Adjacent sequences: A089675 A089676 A089677 * A089679 A089680 A089681`
	KEYWORD	`nonn`
	AUTHOR	`Farideh Firoozbakht (f.firoozbakht(AT)sci.ui.ac.ir), Jan 06 2004`

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Last modified February 14 23:16 EST 2012. Contains 205687 sequences.