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 1-10 of 10 results.

A088773 a(n) = A082778(n+1)/A082778(n).

Original entry on oeis.org

11, 11, 101, 1001, 1000001, 64396630464
Offset: 1

Views

Author

Ray Chandler, Oct 26 2003

Keywords

Crossrefs

Cf. A082778, A088771-A088779.

Extensions

Terms a(6) onward from Ray G. Opao, Sep 09 2004
a(6) corrected, incorrect terms a(7) onward removed by Max Alekseyev, Nov 24 2024

A082776 a(1) = 1, a(n) = smallest palindromic multiple of a(n-1) obtained by inserting digits anywhere in a(n-1).

Original entry on oeis.org

1, 11, 121, 12221, 12233221, 122344443221, 15223441414432251, 15223441429655692414432251
Offset: 1

Views

Author

Amarnath Murthy, Apr 19 2003

Keywords

Comments

a(n)<=(10^A055642(a(n-1))+1)*a(n-1). If a(n-1) > 10 and the last digit of a(n-1) <= 4, then a(n)<=(10^(A055642(a(n-1))-1)+1)*a(n-1). - Chai Wah Wu, Mar 06 2021

Crossrefs

Cf. A055642, A082777, A082778, A082779, A082780.

Extensions

Corrected by Ray Chandler, Oct 13 2003
a(8) from Sean A. Irvine, Apr 19 2010

A082777 a(1) = 2, a(n) = smallest palindromic multiple of a(n-1) obtained by inserting digits anywhere in a(n-1).

Original entry on oeis.org

2, 22, 242, 24442, 24466442, 243465564342, 2434655886885564342, 2434655886887998997886885564342
Offset: 1

Views

Author

Amarnath Murthy, Apr 19 2003

Keywords

Crossrefs

Cf. A082776, A082778, A082779, A082780, A088772.

Extensions

Corrected by Ray Chandler, Oct 13 2003
a(7) from Sean A. Irvine, Apr 19 2010
a(8) from Max Alekseyev, Nov 24 2024

A082779 a(1) = 4, a(n) = smallest palindromic multiple of a(n-1) obtained by inserting digits anywhere in a(n-1).

Original entry on oeis.org

4, 44, 484, 48884, 488888884, 48778998889987784, 487789988899877888778998889987784
Offset: 1

Views

Author

Amarnath Murthy, Apr 19 2003

Keywords

Crossrefs

Cf. A082776, A082777, A082778, A082780.

Extensions

Sequence corrected and erroneous comment removed by Sean A. Irvine, Apr 19 2010
a(7) from Max Alekseyev, Nov 24 2024

A082780 a(1) = 5, a(n) = smallest palindromic multiple of a(n-1) obtained by inserting digits anywhere in a(n-1).

Original entry on oeis.org

5, 55, 5005, 505505, 5005005005, 50055055055005, 50005050055005050005, 5000005005005005005005000005, 50000050055050055055055005055005000005
Offset: 1

Views

Author

Amarnath Murthy, Apr 19 2003

Keywords

Crossrefs

Cf. A082776, A082777, A082778, A082779, A082781, A082782, A082783.

Extensions

Corrected by Ray Chandler, Oct 13 2003
a(8)-a(9) from Sean A. Irvine, Apr 19 2010

A082782 a(1) = 7, a(n) = smallest palindromic multiple of a(n-1) obtained by inserting digits anywhere in a(n-1).

Original entry on oeis.org

7, 77, 1771, 178871, 1788888871, 178888888888888871, 17111188118888288288881188111171
Offset: 1

Views

Author

Amarnath Murthy, Apr 19 2003

Keywords

Crossrefs

Cf. A082776, A082777, A082778, A082779, A082780, A082781, A082783.

Extensions

Corrected by Ray Chandler, Oct 13 2003
a(6) from Sean A. Irvine, Apr 19 2010
a(7) from Max Alekseyev, Nov 24 2024

A082781 a(1) = 6, a(n) = smallest palindromic multiple of a(n-1) obtained by inserting digits anywhere in a(n-1).

Original entry on oeis.org

6, 66, 6006, 606606, 6006006006, 60066066066006, 60006060066006060006, 6000006006006006006006000006, 60000060066060066066066006066006000006
Offset: 1

Views

Author

Amarnath Murthy, Apr 19 2003

Keywords

Crossrefs

Cf. A082776, A082777, A082778, A082779, A082780, A082782, A082783.

Extensions

Corrected by Ray Chandler, Oct 13 2003
a(8)-a(9) from Sean A. Irvine, Apr 19 2010

A082783 a(1) = 8, a(n) = smallest palindromic multiple of a(n-1) obtained by inserting digits anywhere in a(n-1).

Original entry on oeis.org

8, 88, 8008, 808808, 8008008008, 80088088088008, 80008080088008080008, 8000008008008008008008000008, 80000080088080088088088008088008000008
Offset: 1

Views

Author

Amarnath Murthy, Apr 19 2003

Keywords

Crossrefs

Cf. A082776, A082777, A082778, A082779, A082780, A082781, A082782.

Extensions

Corrected and extended by Ray Chandler, Oct 13 2003
a(8)-a(9) from Sean A. Irvine, Apr 19 2010

A088780 a(1) = 9, a(n) = smallest palindromic multiple of a(n-1) obtained by inserting digits anywhere in a(n-1).

Original entry on oeis.org

9, 99, 9009, 909909, 9009009009, 90099099099009, 90009090099009090009, 9000009009009009009009000009, 90000090099090099099099009099009000009
Offset: 1

Views

Author

Ray Chandler, Oct 26 2003

Keywords

Crossrefs

Cf. A082776, A082777, A082778, A082779, A082781, A082782, A082783.

Extensions

a(8) from David Consiglio, Jr., Sep 30 2022
a(9) from Max Alekseyev, Nov 24 2024

A342345 a(1) = 3, a(n) = smallest palindromic nontrivial multiple of a(n-1) containing all decimal digits of a(n-1).

Original entry on oeis.org

3, 33, 363, 36663, 6306036, 63066666036, 6304963866683694036, 6304963866689998999866683694036
Offset: 1

Views

Author

Chai Wah Wu, Mar 08 2021

Keywords

Comments

Differs from A082778 at a(5). a(n) <= (10^A055642(a(n-1))+1)*a(n-1). If a(n-1) > 10 and the last digit of a(n-1) <= 4, then a(n) <= (10^(A055642(a(n-1))-1)+1)*a(n-1).

Examples

			a(4) = 3663 is a palindromic multiple of a(3) = 363 and contains 2 '3' and 1 '6', all the digits of a(3).

Crossrefs

Cf. A055642, A082778.

Extensions

a(8) from Martin Ehrenstein, Mar 10 2021
Showing 1-10 of 10 results.

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