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!)
 A094476 Primes of form 2^j + 17^j. 2
 2, 19, 293, 83537 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The number j must be zero or a power of 2.  Checked j being powers of two through 2^20. Thus a(5) > 10^2500000. Primes of this magnitude are rare (about 1 in 5.9 million), so chance of finding one is remote with today's computer algorithms and speeds. - Robert Price, Apr 29 2013 LINKS EXAMPLE j=0: p=1+1=2;j=1: p=2+17=19;j=2: p=4+289=293;j=4: p=16+83521=83537; the j exponents are powers of 2. MATHEMATICA Select[Table[2^n+17^n, {n, 0, 2000}], PrimeQ] (* Harvey P. Dale, Nov 27 2012 *) CROSSREFS Cf. A082101, A094473-A094480. Sequence in context: A252710 A065923 A293946 * A304637 A119773 A137647 Adjacent sequences:  A094473 A094474 A094475 * A094477 A094478 A094479 KEYWORD nonn AUTHOR Labos Elemer, Jun 01 2004 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 July 16 09:13 EDT 2020. Contains 335784 sequences. (Running on oeis4.)