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 1-8 of 8 results.

A032511 Duplicate of A036900.

Original entry on oeis.org

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

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Author

Keywords

A036906 Scan decimal expansion of zeta(3) until all n-digit strings have been seen; a(n) is number of digits that must be scanned.

Original entry on oeis.org

23, 457, 7839, 83054, 1256587, 13881136, 166670757
Offset: 1

Views

Author

Michael Kleber

Keywords

Links

Crossrefs

Cf. A002117 (decimal expansion of zeta(3)).
Cf. A036902 (last n-digit string seen when scanning the decimal digits of zeta(3)).
Cf. A032510, A036900-A036905.

Extensions

a(7) = 166670757 from Eric W. Weisstein, Sep 17 2013

A088576 Position of the first location of n in the decimal expansion of e.

Original entry on oeis.org

14, 3, 1, 18, 11, 12, 21, 2, 4, 13, 196, 201, 371, 28, 224, 202, 95, 89, 3, 109, 112, 88, 253, 17, 34, 93, 31, 1, 5, 132, 72, 190, 111, 143, 144, 18, 20, 271, 86, 107, 67, 125, 98, 135, 240, 11, 104, 26, 229, 35, 236, 94, 16, 19, 77, 302, 154, 39, 326, 12, 21, 243, 33
Offset: 0

Views

Author

Cino Hilliard, Nov 19 2003

Keywords

Comments

Except for a(0), the same as A051238.

Examples

			The first 7 is in the 2nd position of the digits of e, so a(7) = 2.

Links

Crossrefs

Cf. A001113 (decimal expansion of e).
Cf. A036900 (number of digits in the decimal expansion of e that must scanned to get all n-digit strings).
Cf. A032445 (positions in pi), A088577 (positions in phi).

Programs

  • Mathematica
    Module[{nn=400,ed},ed=RealDigits[E,10,nn][[1]];Table[SequencePosition[ed,IntegerDigits[n],1][[1,1]],{n,0,70}]] (* Harvey P. Dale, Mar 30 2025 *)
  • PARI
    trajedigitsd(n,m) = { default(realprecision,6000); p = exp(1)*10^5000; v = Vec(Str(p)); for(d=0,m, for(x=1,n, if(d<10, y = eval(v[x]), if(d<100, y = eval(v[x])*10 + eval(v[x+1]), if(d<1000, y = eval(v[x])*100 + eval(v[x+1])*10 + eval(v[x+2]), y = eval(v[x])*1000 + eval(v[x+1])*100 + eval(v[x+2])*10 + eval(v[x+3]) ); ); ); if(y == d,print1(x",");break); ); ) }

A036903 Scan decimal expansion of Pi until all n-digit strings have been seen; a(n) is number of digits that must be scanned.

Original entry on oeis.org

32, 606, 8555, 99849, 1369564, 14118312, 166100506, 1816743912, 22445207406, 241641121048, 2512258603207
Offset: 1

Views

Author

Michael Kleber

Keywords

Links

Crossrefs

Cf. A000796 (decimal expansion of Pi).
Cf. A080597 (= a(n) + 1).
Cf. A032445 (starting positions of the first occurrences of n the decimal expansion of Pi).
Cf. A032510 (last n-digit number seen when scanning for all n-digit numbers).
Cf. A036900-A036906.

Formula

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

Extensions

a(8)-a(11) from fabrice(AT)bellard.org (Fabrice Bellard), Oct 23 2011

A036905 Scan decimal expansion of log(2) until all n-digit strings have been seen; a(n) is number of digits that must be scanned.

Original entry on oeis.org

22, 444, 7655, 98370, 1107795, 12983306
Offset: 1

Views

Author

Michael Kleber

Keywords

Links

Crossrefs

Cf. A002162 (decimal expansion of log(2)).
Cf. A036901 (last n-digit number encountered in scanning the decimal digits of log(2)).
Cf. A032510, A036900-A036906.

A036901 Scan decimal expansion of log(2) until all n-digit strings have been seen; a(n) is last string seen.

Original entry on oeis.org

2, 98, 604, 1155, 46847, 175403
Offset: 1

Views

Author

Michael Kleber

Keywords

Links

Crossrefs

Cf. A002162 (decimal expansion of log(2)).
Cf. A036905 (number of digits in the decimal expansion of log(2) that must be scanned to see all n-digit strings).
Cf. A032510, A036900-A036906.

A036902 Scan decimal expansion of zeta(3) until all n-digit strings have been seen; a(n) is last string seen.

Original entry on oeis.org

7, 89, 211, 2861, 43983, 292702, 8261623
Offset: 1

Views

Author

Michael Kleber

Keywords

Links

Crossrefs

Cf. A002117 (decimal expansion of zeta(3)).
Cf. A036906 (number of decimal digits of zeta(3) that must be scanned to see all n-digit strings).
Cf. A032510, A036900-A036906.

Extensions

a(7) = 8261623 from Eric W. Weisstein, Sep 17 2013

A036904 Scan decimal expansion of e until all n-digit strings have been seen; a(n) is number of digits that must be scanned.

Original entry on oeis.org

21, 372, 8092, 102128, 1061613, 12108841, 198150341, 1929504534
Offset: 1

Views

Author

Michael Kleber

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.

Links

Crossrefs

Cf. A001113 (decimal expansion of e).
Cf. A036900 (last number encountered when scanning the decimal expansion of e for all n-digit strings).
Cf. A088576 (starting positions of the first occurrence of n in the decimal expansion of e).
Cf. A032510, A036900-A036906.

Extensions

a(7) from Piotr Idzik, Nov 01 2011
a(8) from Eric W. Weisstein, Sep 11 2013
Showing 1-8 of 8 results.

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