A096761 Position of first occurrence of exactly n consecutive sevens in a row in the decimal expansion of Pi.

13, 559, 4575, 1589, 162248, 399579, 3346228, 82144203, 24658601, 22869046249, 165431035708, 368299898266, 10541103245815, 14793486898235, 46970519777308

Offset

1,1

Comments

Differs from A050286 from a(3) > a(4) on. - M. F. Hasler, Mar 18 2017

a(11) > 99*10^9. - Giovanni Resta, Oct 02 2019

a(15) > 22*10^12. - Dmitry Petukhov, Jan 27 2020

a(16) > 50*10^12. - Dmitry Petukhov, Oct 30 2021

Links

Table of n, a(n) for n=1..15.

David G. Andersen, The Pi-Search Page.

Timothy Mullican, 50 trillion digits of pi

Peter Trüb, 22.4 trillion digits of pi

Crossrefs

First occurrence of n times the same digit: A035117 (n '1's), A050281 (n '2's), A050282, A050283, A050284, A050286, A050287, A048940 (n '9's).

First occurrence of exactly n times the same digit: A096755 (exactly n '1's), A096756, A096757, A096758, A096759, A096760, A096761, A096762, A096763 (exactly n '9's), A050279 (exactly n '0's).

First occurrence of n: A176341; of concatenate(1,...,n): A121280 = A068987 - 1.

Cf. A000796 (decimal expansion (or digits) of Pi).

Sequence in context: A203360 A265503 A050286 * A076461 A168601 A142210

Adjacent sequences: A096758 A096759 A096760 * A096762 A096763 A096764

Keyword

nonn,base,more

Author

Robert G. Wilson v, Jul 07 2004

Extensions

Edited by M. F. Hasler, Mar 19 2017

a(10) from Giovanni Resta, Oct 02 2019

a(11)-a(13) added by Dmitry Petukhov, Jan 13 2020

a(14) from Dmitry Petukhov, Jan 27 2020

a(15) from Dmitry Petukhov, Oct 30 2021

Status

approved