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.

A113818 Decimal expansion of the integer (101101101101101101101101101)/9.

Original entry on oeis.org

1, 1, 2, 3, 3, 4, 5, 5, 6, 7, 7, 9, 0, 0, 1, 2, 2, 3, 4, 4, 5, 6, 6, 7, 8, 9
Offset: 26

Views

Author

Ryohei Miyadera and Daisuke Minematsu, Jan 23 2006

Keywords

Comments

Using square roots and periodic numbers you can produce this kind of curious sequence.

Examples

			(101101101101101101101101101)/9 = 11233455677900122344566789.

Links

Crossrefs

Cf. A021085, A021895, A113694, A113675.

Programs

  • Mathematica
    RealDigits[101101101101101101101101101/9,10,26][[1]] (* Harvey P. Dale, May 21 2020 *)

Formula

(101101101101101101101101101)/9 or Sqrt[101101101101101101101101101], where sqrt is the square root.

Extensions

Edited by N. J. A. Sloane, May 26 2006
Previous Mathematica program replaced by Harvey P. Dale, May 21 2020

A114054 Decimal expansion of 998998998998998998998998998/9.

Original entry on oeis.org

1, 1, 0, 9, 9, 9, 8, 8, 8, 7, 7, 7, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2
Offset: 27

Views

Author

Satoshi Hashiba and Ryohei Miyadera, Feb 02 2006

Keywords

Comments

We have found out that we can generate many interesting sequences with periodic numbers and square roots.

Crossrefs

Cf. A021895, A113694, A113675.

Programs

  • Mathematica
    {998998998998998998998998998/9,Sqrt[998998998998998998998998998]}

Formula

998998998998998998998998998/9 or sqrt(998998998998998998998998998)=3*sqrt(110999888777666555444333222), where sqrt is the square root.

A115595 The sequence 11,0,1,3333,2,3,5555,4,5,7777,6,7,9999,9,0,2222,1,2,4444,3,4,6666,5,6,8888,7,9,11 has three subsequences that have interesting patterns inside it. Namely, 11,0,(1),3333,2,(3),5555,4,(5),7777,6,(7),9999,9,(0),2222,1,(2),4444,3,(4),6666,5,(6),8888,7,(9),11.

Original entry on oeis.org

11, 0, 1, 3333, 2, 3, 5555, 4, 5, 7777, 6, 7, 9999, 9, 0, 2222, 1, 2, 4444, 3, 4, 6666, 5, 6, 8888, 7, 9, 11
Offset: 1

Views

Author

Satoshi Hashiba (fantasia_sato205(AT)kcc.zaq.ne.jp), Mar 10 2006

Keywords

Comments

You can generate very interesting sequences by using periodic numbers and the square root.

Crossrefs

Cf. A021895, A021085, A113675, A113694.

Programs

  • Mathematica
    Sqrt[991199991199991199991199991199991199991199991199991199]

Formula

You can get this sequence by Sqrt[991199991199991199991199991199991199991199991199991199], where Sqrt is the square root. Or (991199991199991199991199991199991199991199991199991199)/9.
Showing 1-3 of 3 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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