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 1-6 of 6 results.

A070836 Duplicate of A063432.

Original entry on oeis.org

1, 11, 10, 111, 11, 10, 1111, 100, 11, 10, 11111, 101, 12, 11, 10, 111111, 110, 20, 12
Offset: 1

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Author

Keywords

A094326 a(n) = 8 written in base n.

Original entry on oeis.org

11111111, 1000, 22, 20, 13, 12, 11, 10, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8
Offset: 1

Views

Author

N. J. A. Sloane, Jun 04 2004

Keywords

Comments

The term 111....1111 should officially be called the "unary expansion", since in base 1 only the digit 0 may appear.

Links

Crossrefs

Cf. A001732, A063432, A035613, A094324, A094325, A094327, A094232, etc.

Formula

From Elmo R. Oliveira, Jun 15 2024: (Start)
G.f.: x*(11111111-11110111*x-978*x^2-2*x^3-7*x^4-x^5-x^6-x^7-2*x^8)/(1-x).
a(n) = 8 for n > 8. (End)

A094324 a(n) = 5 written in base n.

Original entry on oeis.org

11111, 101, 12, 11, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5
Offset: 1

Views

Author

N. J. A. Sloane, Jun 04 2004

Keywords

Comments

The term 111....1111 should officially be called the "unary expansion", since in base 1 only the digit 0 may appear.

Links

Crossrefs

Cf. A001735, A063432, A035613, A094325, A094326, A094327, A094232, etc.

Formula

From Elmo R. Oliveira, Jun 15 2024: (Start)
G.f.: x*(11111-11010*x-89*x^2-x^3-x^4-5*x^5)/(1-x).
a(n) = 5 for n > 5. (End)

A094325 a(n) = 6 written in base n.

Original entry on oeis.org

111111, 110, 20, 12, 11, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6
Offset: 1

Views

Author

N. J. A. Sloane, Jun 04 2004

Keywords

Comments

The term 111....1111 should officially be called the "unary expansion", since in base 1 only the digit 0 may appear.

Links

Crossrefs

Cf. A001734, A063432, A035613, A094324, A094326, A094327, A094232, etc.

Formula

From Elmo R. Oliveira, Jun 15 2024: (Start)
G.f.: x*(111111-111001*x-90*x^2-8*x^3-x^4-x^5-4*x^6)/(1-x).
a(n) = 6 for n > 6. (End)

A094327 a(n) = 9 written in base n.

Original entry on oeis.org

111111111, 1001, 100, 21, 14, 13, 12, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9
Offset: 1

Views

Author

N. J. A. Sloane, Jun 04 2004

Keywords

Comments

The term 111....1111 should officially be called the "unary expansion", since in base 1 only the digit 0 may appear.

Links

Crossrefs

Cf. A001731, A063432, A035613, A094324, A094325, A094326, A094232, etc.

Programs

  • Mathematica
    Join[{111111111},Table[FromDigits[IntegerDigits[9,n]],{n,2,90}]] (* Stefano Spezia, Nov 10 2023 *)

Formula

G.f.: x*(111111111 - 111110110*x - 901*x^2 - 79*x^3 - 7*x^4 - x^5 - x^6 - x^7 - x^8 - x^9)/(1 - x). - Stefano Spezia, Nov 10 2023

A063431 Square array read by antidiagonals of n written in base k (n,k>0).

Original entry on oeis.org

1, 1, 11, 1, 10, 111, 1, 2, 11, 1111, 1, 2, 10, 100, 11111, 1, 2, 3, 11, 101, 111111, 1, 2, 3, 10, 12, 110, 1111111, 1, 2, 3, 4, 11, 20, 111, 11111111, 1, 2, 3, 4, 10, 12, 21, 1000, 111111111, 1, 2, 3, 4, 5, 11, 13, 22, 1001, 1111111111, 1, 2, 3, 4, 5, 10, 12, 20, 100
Offset: 1

Views

Author

Henry Bottomley, Jul 20 2001

Keywords

Comments

It is difficult to write ten in base 11 using decimal digits.

Examples

			Rows start (1, 1, 1, 1, 1,...), (11, 10, 2, 2, 2,...), (111, 11, 10, 3, 3,...), (1111, 100, 11, 10, 4,...), etc.

Crossrefs

Cf. A063432. Rows start effectively as the reverse of A001731, A001732, A001733, A001734, A001735, A001736, A008707, A008708, A008709, A008710, A008711, A008712, A008713, A008714, A008715, A008716, A008717 etc. Columns are A000042, A007088, A007089, A007090, A007091, A007092, A007093, A007094, A007095, A000027 and perhaps A055649 etc.
Showing 1-6 of 6 results.

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

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