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A018143
Powers of fifth root of 10 rounded up.
7
1, 2, 3, 4, 7, 10, 16, 26, 40, 64, 100, 159, 252, 399, 631, 1000, 1585, 2512, 3982, 6310, 10000, 15849, 25119, 39811, 63096, 100000, 158490, 251189, 398108, 630958, 1000000, 1584894, 2511887, 3981072, 6309574
OFFSET
0,2
MATHEMATICA
Ceiling[Surd[10, 5]^Range[0, 40]] (* Harvey P. Dale, Dec 30 2017 *)
PROG
(PARI) a(n) = sqrtnint(10^n-1, 5) + 1; \\ Michel Marcus, Jun 26 2024
CROSSREFS
Sequence in context: A293161 A235648 A051449 * A373783 A281839 A136570
KEYWORD
nonn
AUTHOR
STATUS
approved