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A017934
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Powers of sqrt(10) rounded down.
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7
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1, 3, 10, 31, 100, 316, 1000, 3162, 10000, 31622, 100000, 316227, 1000000, 3162277, 10000000, 31622776, 100000000, 316227766, 1000000000, 3162277660, 10000000000, 31622776601, 100000000000
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..1000
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FORMULA
| a(n)=floor(sqrt(10^n)) - Zak Seidov
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MATHEMATICA
| Floor[Sqrt[10^Range[0, 100]]] (* Zak Seidov *)
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PROG
| (MAGMA) A017934 := func< n | Isqrt(10^n) >; // Jason Kimberley, Aug 19 2011
(MAGMA) A017934 := func< n | Floor(Sqrt(RealField(n)!10^n)) >; // Jason Kimberley, Aug 19 2011
(PARI) a(n)=sqrtint(10^n) \\ Charles R Greathouse IV, Nov 18 2011
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CROSSREFS
| Cf. A010467 Decimal expansion of sqrt(10), A131581, A136582, A175733, A175734.
Sequence in context: A100058 A002160 A114487 * A005510 A005725 A079522
Adjacent sequences: A017931 A017932 A017933 * A017935 A017936 A017937
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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