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A018074
Powers of fourth root of 10 rounded up.
7
1, 2, 4, 6, 10, 18, 32, 57, 100, 178, 317, 563, 1000, 1779, 3163, 5624, 10000, 17783, 31623, 56235, 100000, 177828, 316228, 562342, 1000000, 1778280, 3162278, 5623414, 10000000, 17782795, 31622777, 56234133, 100000000, 177827942, 316227767, 562341326, 1000000000
OFFSET
0,2
MATHEMATICA
Ceiling[(Power[10, (4 )^-1])^Range[0, 50]] (* Harvey P. Dale, Mar 18 2011 *)
PROG
(PARI) a(n) = sqrtnint(10^n-1, 4) + 1; \\ Michel Marcus, Jun 26 2024
CROSSREFS
Cf. A011007, A017936 (bisection), A308467.
Sequence in context: A203175 A102477 A232582 * A288465 A000067 A133140
KEYWORD
nonn
AUTHOR
EXTENSIONS
More terms from Michel Marcus, Aug 21 2019
STATUS
approved