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A278119
a(n) is the index of the first occurrence of n in A278116.
1
1, 2, 3, 5, 9, 27, 81, 163, 3451, 7372, 82177, 3716, 2769544, 25899347, 357567610, 4229297109
OFFSET
1,2
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
Sequence in context: A354141 A105180 A094206 * A118998 A276410 A003432
KEYWORD
nonn,hard,more
AUTHOR
Jason Kimberley, Feb 15 2017
STATUS
approved