A004590 - OEIS

%I #20 Sep 08 2022 08:44:33

%S 3,1,0,6,4,4,2,5,4,2,6,3,1,4,6,1,0,0,2,5,1,4,1,5,3,6,5,3,4,3,4,6,2,1,

%T 6,3,2,5,4,0,1,6,5,2,1,0,2,1,5,6,0,6,6,4,2,6,1,6,1,0,2,6,3,2,5,6,5,4,

%U 3,1,2,1,1,6,5,5,5,2,1,3,4,0,6,5,0,6,3,2,0,5,1,1,0,0,5,1,6,0,3

%N Expansion of sqrt(10) in base 7.

%H G. C. Greubel, <a href="/A004590/b004590.txt">Table of n, a(n) for n = 1..10000</a>

%H Jason Kimberley, <a href="/wiki/User:Jason_Kimberley/sqrt_base">Index of expansions of sqrt(d) in base b</a>

%e 3.106442542631461...

%t RealDigits[Sqrt[10], 7, 105][[1]] (* _Alonso del Arte_, Jul 31 2014 *)

%o (Magma) Prune(Reverse(IntegerToSequence(Isqrt(10*7^200),7))); // _Jason Kimberley_, Feb 2012

%Y Cf. A010467.

%K nonn,base,cons,easy

%O 1,1

%A _N. J. A. Sloane_

%E a(72) onwards corrected by _Sean A. Irvine_, Jan 29 2016