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A017935 Powers of sqrt(10) rounded to nearest integer. 1
1, 3, 10, 32, 100, 316, 1000, 3162, 10000, 31623, 100000, 316228, 1000000, 3162278, 10000000, 31622777, 100000000, 316227766, 1000000000, 3162277660, 10000000000, 31622776602, 100000000000, 316227766017, 1000000000000, 3162277660168, 10000000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..1994 (truncated by Georg Fischer, Apr 27 2019)

FORMULA

a(n) = round(10^(n/2)).

MAPLE

a:= proc(n) Digits:= 10+iquo(n, 2): round(sqrt(10)^n) end:

seq(a(n), n=0..40);  # Alois P. Heinz, Apr 27 2019

MATHEMATICA

Floor[(Sqrt[10]^Range[0, 40]+1/2)] (* Vincenzo Librandi, Nov 19 2011 *)

PROG

(PARI) a(n)=round(sqrt(10)^n) \\ Charles R Greathouse IV, Nov 18 2011

(MAGMA) [Round(Sqrt(10)^n): n in [0..40]]; // Vincenzo Librandi, Nov 19 2011

CROSSREFS

Sequence in context: A053581 A247595 A092822 * A134377 A278133 A077826

Adjacent sequences:  A017932 A017933 A017934 * A017936 A017937 A017938

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified October 22 19:53 EDT 2019. Contains 328319 sequences. (Running on oeis4.)