The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A123210 Numbers n such that (n!)^3+(n!)^2+1 is prime. 0
 0, 1, 2, 4, 5, 7, 14, 41, 44, 51, 54, 161, 1379 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Analogous to A046029 Numbers n such that (n!)^2+1 is prime. a(14) > 10^4. - Robert Price, Aug 06 2014 LINKS EXAMPLE a(7) = 14 because (14!)^3+(14!)^2+1 = 662559760556747835222526525440001 is prime. MATHEMATICA Select[Range[200], PrimeQ[#!^3 + #!^2 + 1] &] PROG (MAGMA)[n: n in [0..160]|IsPrime((Factorial(n)^3)+(Factorial(n)^2)+1)][Vincenzo Librandi, Dec 22 2010] CROSSREFS Cf. A000142, A046029. Sequence in context: A115883 A063508 A101724 * A019277 A127791 A290431 Adjacent sequences:  A123207 A123208 A123209 * A123211 A123212 A123213 KEYWORD easy,nonn AUTHOR Jonathan Vos Post, Oct 05 2006 EXTENSIONS a(8)-a(11) from Vincenzo Librandi, Dec 22 2010 a(13) from Robert Price, Aug 06 2014 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified April 7 04:20 EDT 2020. Contains 333292 sequences. (Running on oeis4.)