A278119 a(n) is the index of the first occurrence of n in A278116.

1, 2, 3, 5, 9, 27, 81, 163, 3451, 7372, 82177, 3716, 2769544, 25899347, 357567610, 4229297109

Offset: 1

Author

Jason Kimberley, Feb 15 2017

Keywords

• nonn
• hard
• more

Comments

a(18) = 42945966786, but a(17) > 5*10^10.

Links

• R. B. Eggleton, J. S. Kimberley and J. A. MacDougall, Square-free rank of integers, Journal of Combinatorial Mathematics and Combinatorial Computing Vol. 106, Issue August 2018, p. 185-207.

Crossrefs

Cf. A278106, A278116.