1,1

Robert Price, Table of n, a(n) for n = 1..10000

A190641(4)=12, 12 = 2*2*3, so 12 has only one square factor, namely 4.

Cf. A190641 A283671.

Sequence in context: A097667 A202388 A283919 * A019627 A137617 A023405

Adjacent sequences: A283667 A283668 A283669 * A283671 A283672 A283673

nonn

Robert Price, Mar 13 2017

approved