A096757 Index of first occurrence of exactly n consecutive threes in a row in the decimal expansion of Pi.

9, 24, 1698, 66846, 28467, 1129019, 710100, 36488176, 2011485307, 4663739959, 60422218263, 1379574176590, 26258139334603

Offset: 1

Author

Robert G. Wilson v, Jul 07 2004

Keywords

• nonn
• base
• more

Comments

Differs from A050282 as soon as a(4) > a(5), while A050282(4) = A050282(5) = a(5). - M. F. Hasler, Apr 13 2019

a(12) > 99*10^9. - Giovanni Resta, Oct 02 2019

a(13) > 22*10^12. - Dmitry Petukhov, Jan 26 2020

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

Links

• David G. Andersen, The Pi-Search Page.
• Timothy Mullican, 50 trillion digits of pi
• Peter Trüb, 22.4 trillion digits of pi

Crossrefs

Cf. A050282 (same for at least three 3s); A050279, A035117, A096756, A096758, A096759, A096760, A096761, A096762, A096763 (analog for digits 0, 1, 2, 4, ...).

Extensions

a(11) from Giovanni Resta, Oct 02 2019

a(12) from Dmitry Petukhov, Jan 26 2020

a(13) from Dmitry Petukhov, Oct 28 2021