

A226707


Least number k such that 5^(2^i) + k is prime for i = 0,1,..,n1.


4




OFFSET

1,1


LINKS

Table of n, a(n) for n=1..10.


EXAMPLE

a(5) = 384 because k = 384 is the minimal k such that N = 5^(2^i) + k is prime for i = 0, 1, 2, 3, 4; N = 389, 409, 1009, 391009, 152587891009. But 5^(2^5) + 384 is divisible by 797 and another prime.


CROSSREFS

Cf. A129613, A225560 A226281.
Sequence in context: A155948 A228955 A328584 * A097504 A189144 A130726
Adjacent sequences: A226704 A226705 A226706 * A226708 A226709 A226710


KEYWORD

nonn,more


AUTHOR

Robin Garcia, Jun 15 2013


EXTENSIONS

a(10) from Giovanni Resta, Jun 16 2013


STATUS

approved



