OFFSET
1,1
COMMENTS
Primes in A051213.
EXAMPLE
7 is in this sequence because 7 = 2^3 - 1^2 = 2^4 - 3^2 = 2^5 - 5^2 = 2^7 - 11^2 = 2^15 - 181^2.
1559 is in this sequence because 1559 = 2^19 - 723^2 is prime. - Sean A. Irvine, Apr 28 2022
MATHEMATICA
Select[Union[Flatten[Table[2^x - y^2, {x, 16}, {y, 0, Floor[Sqrt[2^x]]}]]], PrimeQ] (* Alonso del Arte, Oct 05 2014 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Juri-Stepan Gerasimov, Oct 05 2014
EXTENSIONS
a(24)-a(38) from Alonso del Arte, Oct 05 2014
More terms and missing terms inserted by Sean A. Irvine, Apr 28 2022
STATUS
approved