1,1

Table of n, a(n) for n=1..14.

A273043(1)=6, 2^6-1=63, 63=3*3*7, 63 is not squarefree and the square is 3*3=9.

Cf. A237043, A282632.

Sequence in context: A110284 A109367 A110588 * A245694 A045972 A297596

Adjacent sequences: A282628 A282629 A282630 * A282632 A282633 A282634

nonn

Robert Price, Feb 19 2017

approved