cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-3 of 3 results.

A036900 Scan decimal expansion of e until all n-digit strings have been seen; a(n) is last string seen.

Original entry on oeis.org

6, 12, 548, 1769, 92994, 513311, 1934715, 56891305
Offset: 1

Views

Author

Keywords

Comments

The digits scanned are {2, 7, 1, 8, 2, 8, ...}, so the initial 2 in 2.71828... is included and counted as the first digit.

Crossrefs

Cf. A001113 (decimal expansion of e).
Cf. A036904 (number of digits in the decimal expansion of e that must be scanned to get all n-digit number).
Cf. A088576 (starting position of the first occurrence of n in the decimal expansion of e).

Extensions

a(7) = 1934715 from Eric W. Weisstein, Sep 10 2013
a(8) = 56891305 from Eric W. Weisstein, Sep 11 2013

A080597 Number of terms from the decimal expansion of Pi (A000796) which include every combination of n digits as consecutive subsequences.

Original entry on oeis.org

33, 607, 8556, 99850, 1369565, 14118313, 166100507, 1816743913, 22445207407, 241641121049, 2512258603208
Offset: 1

Views

Author

Martin Hasch (martin(AT)mathematik.uni-ulm.de), Feb 23 2003

Keywords

Examples

			a(2) = 607 because the first 607 digits of Pi contain every conceivable 2-digit subsequence but the first 606 digits do not. The combination (6, 8) appears as 606th and 607th term in A000796.
		

Crossrefs

Cf. A000796 (decimal expansion of Pi).
Cf. A036903 (= a(n) - 1).
Cf. A032510 (last digit string when scanning the decimal expansion of Pi for all n-digit strings).

Formula

a(n) = A036903(n) + 1. - Eric W. Weisstein, Sep 11 2013

Extensions

a(7)-a(8) from Piotr Idzik, Nov 01 2011
a(9)-a(11) from A036903(n) + 1 by Eric W. Weisstein, Sep 11 2013

A332262 Maximum position to start a search within the decimal digits of Pi in order to find all numeric strings with length n.

Original entry on oeis.org

32, 605, 8553, 99846, 1369560, 14118307, 166100500, 1816743905, 22445207398, 241641121039, 2512258603197
Offset: 1

Views

Author

Martin Renner, Feb 25 2020

Keywords

Comments

The minimum position is always 1.

Examples

			a(1) = 32, since 0 appears at the 32nd decimal digit of Pi.
a(2) = 605, since 68 appears at the 605th decimal digit of Pi.
a(3) = 8553, since 483 appears at the 8553rd decimal digit of Pi.
		

Crossrefs

Formula

a(n) = A036903(n) - n + 1 = A080597(n) - n.

Extensions

a(9)-a(11) from A080597(n) - n by Jinyuan Wang, Mar 01 2020
Showing 1-3 of 3 results.