A050279 a(n) is the starting position of the first occurrence of a string of at least n '0's in the decimal expansion of Pi.

32, 307, 601, 13390, 17534, 1699927, 3794572, 172330850, 2542542102, 8324296435, 371247087572, 1755524129973, 3186699229890, 6381820482331

Offset: 1

Author

Eric W. Weisstein

Keywords

• nonn
• base
• more

Comments

At least up to a(10), also the starting position of the first occurrence of a string of exactly n '0's in the decimal expansion of Pi, cf. A096764. - M. F. Hasler, Mar 19 2017, edited Sep 03 2017

a(15) > 22*10^12. - Dmitry Petukhov, Jan 28 2020

References

• Shigeru Kondo, calculation of Pi to 12.8 * 10^9 digits, using the program PiFast of Xavier Gourdon

Links

• David G. Andersen, The Pi-Search Page.
• Peter Trüb, 22.4 trillion digits of pi
• Eric Weisstein's World of Mathematics, Pi Digits

Crossrefs

See A096764 for another version.

Cf. A000796: Decimal expansion (or digits) of Pi.

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), A096764 (exactly n '0's).

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 concatenate(1,...,n): A121280 = A068987 - 1.

Extensions

More terms from Colin B. Martin (martinc(AT)ram.net.au), Nov 25 2001

Edited by N. J. A. Sloane at the suggestion of M. F. Hasler, Aug 24 2007

Edited by M. F. Hasler, Mar 19 2017

Definition modified by N. J. A. Sloane, Sep 03 2017

a(11)-a(14) added by Dmitry Petukhov, Jan 12 2020