A278119 - OEIS

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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

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

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

LINKS

Table of n, a(n) for n=1..16.

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.

Sequence in context: A354141 A105180 A094206 * A118998 A276410 A003432

Adjacent sequences: A278116 A278117 A278118 * A278120 A278121 A278122

KEYWORD

nonn,hard,more

AUTHOR

Jason Kimberley, Feb 15 2017

STATUS

approved