1,1

Table of n, a(n) for n=1..36.

a(3)=1531 since 1531-(1^4+5^4+3^4+1^4)=1531-708=823 is prime and 1531+708=2239 is prime.

Sequence in context: A104299 A032632 A241959 * A137872 A053072 A303092

Adjacent sequences: A179592 A179593 A179594 * A179596 A179597 A179598

nonn,base

Carmine Suriano, Jul 20 2010

approved