A154111 Numbers n such that (n+1)^2 - n^3 is a (positive or negative) prime.

1, 3, 5, 6, 8, 11, 12, 15, 18, 20, 27, 33, 35, 39, 41, 45, 48, 50, 54, 65, 66, 68, 86, 87, 92, 96, 99, 107, 116, 122, 123, 126, 138, 140, 149, 150, 156, 159, 161, 164, 165, 167, 170, 177, 182, 185, 188, 191, 192, 198, 200, 207, 209, 219, 228, 237, 239, 240, 242, 252

Offset

1,2

Links

G. C. Greubel, Table of n, a(n) for n = 1..2000

Mathematica

Select[Range[300], PrimeQ[(#+1)^2-#^3]&] (* Harvey P. Dale, Dec 06 2015 *)

Prog

(Magma) [n: n in [0..500] | IsPrime((n+1)^2-n^3)] # Vincenzo Librandi, Nov 26 2010
(PARI) is(n)=isprime(abs((n+1)^2 - n^3)) \\ Charles R Greathouse IV, Sep 02 2016

Crossrefs

Cf. A140719, A005097.

Sequence in context: A301744 A087720 A309544 * A047444 A279933 A327206

Adjacent sequences: A154108 A154109 A154110 * A154112 A154113 A154114

Keyword

nonn,easy

Author

Vladimir Joseph Stephan Orlovsky, Jan 04 2009

Status

approved