A050282 a(n) is the starting position of the first occurrence of a string of at least n 3's in the decimal expansion of Pi.

9, 24, 1698, 28467, 28467, 710100, 710100, 36488176, 2011485307, 4663739959, 60422218263, 1379574176590, 26258139334603

Offset: 1

Author

Eric W. Weisstein

Keywords

• nonn
• base
• more

Comments

Differs from A096757 which lists occurrences of strings of exactly n '3's. - M. F. Hasler, Mar 17 2017

a(14) > 50*10^12. - Dmitry Petukhov, Oct 28 2021

Links

• Timothy Mullican, 50 trillion digits of pi
• Peter Trüb, 22.4 trillion digits of pi
• Eric Weisstein's World of Mathematics, Pi Digits

Crossrefs

Cf. A035117 (n '1's), A050281 (n '2's), A050282, A050283, A050284, A050286, A050287, A048940 (n '9's).

Cf. A096755 (exactly n '1's), A096756, A096757, A096758, A096759, A096760, A096761, A096762, A096763 (exactly n '9's), A050279 (exactly n '0's).

Extensions

a(9)-a(10) from Colin Martin (cbmartin(AT)tpg.com.au), Mar 03 2002

a(11) from Giovanni Resta, Oct 02 2019

a(12) from Dmitry Petukhov, Jan 26 2020

a(13) from Dmitry Petukhov, Oct 28 2021