OFFSET
0,1
LINKS
Carlos Rivera's Prime Puzzles, Prime Generating Non-Polynomials
EXAMPLE
a(3) = 7 because 7 + 4, 7 + 40 and 7 + 940 are primes, but 7 + 45040 = 107 * 421 is not.
CROSSREFS
KEYWORD
hard,more,nonn
AUTHOR
Fred Schneider, May 16 2015
STATUS
approved