The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A087191 Primes of the form k^4 - (k+1)^3. 4
 17, 131, 409, 953, 1889, 8669, 18539, 60623, 77689, 122321, 373049, 437293, 590267, 2249441, 8975009, 9649303, 11111117, 14526289, 19836689, 26484839, 31201649, 56608289, 67796273, 80565889, 84021983, 87588089, 107150489, 150402113 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..5000 EXAMPLE a(2) = 4^4 - (4+1)^3 = 256 - 125 = 131. MATHEMATICA Select[Table[n^4-(n+1)^3, {n, 3, 101900}], PrimeQ] (* Vincenzo Librandi, Dec 10 2011 *) PROG (Magma) [a: n in [3..120] | IsPrime(a) where a is n^4-(n+1)^3]; // Vincenzo Librandi, Dec 10 2011 CROSSREFS Cf. A087190 n such that n^4-(n+1)^3 is prime. Sequence in context: A179818 A138640 A142676 * A158959 A355052 A259418 Adjacent sequences: A087188 A087189 A087190 * A087192 A087193 A087194 KEYWORD nonn,easy AUTHOR Hugo Pfoertner, Aug 24 2003 STATUS approved

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

Last modified September 22 00:10 EDT 2023. Contains 365503 sequences. (Running on oeis4.)