A018143 Powers of fifth root of 10 rounded up.

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

Author

N. J. A. Sloane

Keywords

• nonn

Crossrefs

Cf. A018141, A018142.

Programs

Mathematica

Ceiling[Surd[10,5]^Range[0,40]] (* Harvey P. Dale, Dec 30 2017 *)

PARI

a(n) = sqrtnint(10^n-1, 5) + 1; \\ Michel Marcus, Jun 26 2024