A096567 First digit to appear n times in the base-10 expansion of Pi.

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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1

Offset

1,1

Comments

The number 7 finally appears as a(32344). - T. D. Noe, Sep 13 2012

The number 6 appears for the first time as a(99032274). - Kester Habermann, Feb 01 2021

Links

Jianing Song, Table of n, a(n) for n = 1..32373 (added to include the first occurrences of 0 and 7, first 10000 terms from T. D. Noe)

Example

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

Mathematica

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 *)

Crossrefs

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

Cf. A195138, A195139, A195141, A280811.

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

Sequence in context: A013597 A092131 A092099 * A239626 A076363 A143865

Adjacent sequences: A096564 A096565 A096566 * A096568 A096569 A096570

Keyword

base,nonn

Author

Matthew Vandermast, Jun 26 2004

Extensions

More terms from David Wasserman, Nov 16 2007

Status

approved