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A094560 Initial decimal digit of Pi*n, Pi=3.1415... 2

%I #9 Dec 31 2021 14:48:03

%S 3,6,9,1,1,1,2,2,2,3,3,3,4,4,4,5,5,5,5,6,6,6,7,7,7,8,8,8,9,9,9,1,1,1,

%T 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,

%U 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3

%N Initial decimal digit of Pi*n, Pi=3.1415...

%C a(n) = A000030(A022844(n)).

%t Table[RealDigits[Pi n,10,20][[1,1]],{n,120}] (* _Harvey P. Dale_, Dec 31 2021 *)

%o (PARI) a(n) = digits(floor(n*Pi))[1]; \\ _Michel Marcus_, May 08 2016

%Y Cf. A094561, A094562, A000796.

%K nonn,base

%O 1,1

%A _Reinhard Zumkeller_, May 12 2004

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