1,1

Ray Chandler, Table of n, a(n) for n = 1..10000

G.f.: (Sum_{k>=1} x^(prime(k)^2))*(Sum_{k>=1} x^(prime(k)^3)). - Ilya Gutkovskiy, Jan 06 2017

a(12) = 1 because 12 = 2^2 + 2^3; a(17) = 1 because 17 = 2^3 + 3^2.

a(129) = 2 because 129 = 2^3 + 11^2 = 2^2 + 5^3.

Cf. A045699, A045700, A196752, A196753.

Sequence in context: A323547 A294930 A294937 * A277156 A193095 A011725

Adjacent sequences: A045698 A045699 A045700 * A045702 A045703 A045704

easy,nonn

Felice Russo

More terms from Erich Friedman

approved