A096567 - OEIS

%I #43 Apr 01 2021 23:15:57

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

%T 4,4,4,4,4,8,2,2,8,2,4,4,4,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,

%U 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1

%N First digit to appear n times in the base-10 expansion of Pi.

%C The number 7 finally appears as a(32344). - _T. D. Noe_, Sep 13 2012

%C The number 6 appears for the first time as a(99032274). - _Kester Habermann_, Feb 01 2021

%H Jianing Song, <a href="/A096567/b096567.txt">Table of n, a(n) for n = 1..32373</a> (added to include the first occurrences of 0 and 7, first 10000 terms from T. D. Noe)

%e a(3) = 5 because 5 is the first digit to appear 3 times in the decimal expansion of Pi = 3.141(5)926(5)3(5)... - _Bobby Jacobs_, Aug 30 2017

%t nn = 1000; t = {}; d = RealDigits[Pi, 10, nn][[1]]; dCnt = Table[0, {10}]; cnt = 1; Do[b = ++dCnt[[1 + d[[n]]]]; If[b == cnt, AppendTo[t, d[[n]]]; cnt++], {n, nn}]; t (* _T. D. Noe_, Sep 13 2012 *)

%Y Cf. A000796, A014976, A053745-A053753, A096566.

%Y Cf. A195138, A195139, A195141, A280811.

%Y Cf. A276686, A276992, A276993, A277171, A291599, A291600.

%K base,nonn

%O 1,1

%A _Matthew Vandermast_, Jun 26 2004

%E More terms from _David Wasserman_, Nov 16 2007