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 A161470 Primes of the form 3^k+2^k+k^3-k^2. 2
 5, 17, 53, 2609, 1604543, 7625731721669, 67585198634826967968486182915129003 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The associated k are 1, 2, 3, 7, 13, 27, 73, 994, 1129, ... - R. J. Mathar, Jun 12 2009 The next term has 475 digits. - Harvey P. Dale, Dec 12 2010 LINKS MATHEMATICA A161470 = {}; Do[If[PrimeQ[p = (3^n + 2^n) + (n^3 - n^2)], AppendTo[A161470, p]], {n, 6!}]; A161470 (* Orlovsky *) (* Alternate: *) Select[Table[3^k + 2^k + k^3 - k^2, {k, 2000}], PrimeQ] (* Harvey P. Dale, Dec 12 2010 *) PROG (Magma) [ a: n in [1..450] | IsPrime(a) where a is 3^n+2^n+n^3-n^2] // Vincenzo Librandi, Nov 30 2010 CROSSREFS Cf. A058765, A082101, A161469. Sequence in context: A149656 A146063 A146006 * A295163 A195689 A079363 Adjacent sequences: A161467 A161468 A161469 * A161471 A161472 A161473 KEYWORD nonn AUTHOR Vladimir Joseph Stephan Orlovsky, Jun 10 2009 EXTENSIONS Definition simplified by R. J. Mathar, Jun 12 2009 STATUS approved

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Last modified March 20 17:37 EDT 2023. Contains 361391 sequences. (Running on oeis4.)