id:A154112 - OEIS Search Results

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Numbers n such that (n+1)^3-n^2 is prime.

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1, 2, 4, 5, 6, 7, 9, 10, 11, 12, 16, 19, 20, 32, 34, 37, 42, 44, 45, 49, 51, 52, 56, 60, 62, 70, 72, 74, 75, 77, 79, 81, 89, 90, 95, 96, 97, 100, 101, 104, 105, 111, 114, 115, 121, 126, 131, 136, 145, 151, 154, 156, 161, 171, 174, 175, 180, 182, 191, 199, 200, 202, 207 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`2^3-1^2=7, 3^3-2^2=23, ...`
	MATHEMATICA	`a[n_]:=(n+1)^3-n^2; lst={}; Do[If[PrimeQ[a[n]], AppendTo[lst, n]], {n, 6!}]; lst`
	CROSSREFS	`Cf. A140719, A005097, A154111` `Sequence in context: A039139 A024616 A023733 this_sequence A039101 A140102 A084437` `Adjacent sequences: A154109 A154110 A154111 this_sequence A154113 A154114 A154115`
	KEYWORD	`nonn`
	AUTHOR	`Vladimir Orlovsky (4vladimir(AT)gmail.com), Jan 04 2009`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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