1,1

Composite numbers n such that A111725(n) = A010554(n).

Contains as a subsequence the nontrivial prime powers (A246547) except 2^3 = 8.

Table of n, a(n) for n=1..77.

Subsequence of A300064.

Set difference of A002808 and A300065.

Contains A300080 as a subsequence.

Cf. A002322, A010554, A111725.

Sequence in context: A284654 A010428 A189300 * A233182 A028260 A085155

Adjacent sequences: A300076 A300077 A300078 * A300080 A300081 A300082

nonn

Max Alekseyev, Feb 24 2018

approved