id:A157007 - OEIS Search Results

Search: id:A157007

Displaying 1-1 of 1 results found.

page 1

Numbers n such that 2^n+3^3 is prime.

+0
1

1, 2, 4, 5, 8, 10, 13, 14, 16, 40, 41, 44, 86, 110, 125, 133, 134, 145, 154, 184, 194, 301, 308, 320, 685, 1001, 1066, 1496, 1633 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`For n = 1 2^1 + 27 = 29` `For n = 2 2^2 + 27 = 31` `For n = 4 2^4 + 27 = 43`
	MATHEMATICA	`Delete[Union[Table[If[PrimeQ[2^n + 27], n, 0], {n, 1, 2000}]], 1]`
	CROSSREFS	`A019434 (2^(2^n)+1) A057733 (2^n+3) A123250 (2^n+5)` `A104071 (Primes of the form 2^n+27)` `Sequence in context: A123886 A005242 A115392 this_sequence A007729 A144876 A072437` `Adjacent sequences: A157004 A157005 A157006 this_sequence A157008 A157009 A157010`
	KEYWORD	`nonn`
	AUTHOR	`Edwin Dyke (ed.dyke(AT)btinternet.com), Feb 20 2009`

page 1

Search completed in 0.002 seconds

Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

AT&T Labs Research