1,1

Table of n, a(n) for n=1..55.

43 is prime, and is 4^2 + 3^3, a sum of powers of its digits, and thus also a d-powerful number.

Cf. A007532, A061862, A134703.

Sequence in context: A090716 A083820 A244556 * A120804 A092066 A224904

Adjacent sequences: A279951 A279952 A279953 * A279955 A279956 A279957

nonn,base

Randy L. Ekl, Dec 23 2016

approved