A017934 Powers of sqrt(10) rounded down.
1, 3, 10, 31, 100, 316, 1000, 3162, 10000, 31622, 100000, 316227, 1000000, 3162277, 10000000, 31622776, 100000000, 316227766, 1000000000, 3162277660, 10000000000, 31622776601, 100000000000, 316227766016, 1000000000000, 3162277660168, 10000000000000
Offset: 0
Keywords
Links
- Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Programs
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Magma
A017934 := func< n | Isqrt(10^n) >; // Jason Kimberley, Aug 19 2011
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Magma
A017934 := func< n | Floor(Sqrt(RealField(n)!10^n)) >; // Jason Kimberley, Aug 19 2011
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Mathematica
Floor[Sqrt[10^Range[0,100]]] (* Zak Seidov *)
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PARI
a(n)=sqrtint(10^n) \\ Charles R Greathouse IV, Nov 18 2011
Formula
a(n) = floor(sqrt(10^n)). - Zak Seidov