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.

Previous Showing 21-28 of 28 results.

A062224 Numbers k such that the smoothly undulating palindromic number (75*10^k - 57)/99 is a prime.

Original entry on oeis.org

3, 17, 77, 143, 149, 513, 1079, 1415, 6249, 13265, 14579, 15293, 41657, 72941
Offset: 1

Views

Author

Patrick De Geest and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001

Keywords

Comments

Prime versus probable prime status and proofs are given in the author's table.
No further terms < 100000. - Ray Chandler, Aug 17 2011

Examples

			k=17 -> (75*10^17 - 57)/99 = 75757575757575757.

Links

Crossrefs

Cf. A062209-A062232, A059758, A032758.

Extensions

a(13)=41657 from Ray Chandler, Nov 11 2010
a(14)=72941 from Ray Chandler, Mar 24 2011
Edited by Ray Chandler, Aug 17 2011

A062225 Numbers k such that the smoothly undulating palindromic number (78*10^k - 87)/99 is a prime.

Original entry on oeis.org

3, 5, 21, 27, 95, 2075, 2165, 3047, 3503, 16791, 34883
Offset: 1

Views

Author

Patrick De Geest and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001

Keywords

Comments

Prime versus probable prime status and proofs are given in the author's table.
No further terms < 100000. - Ray Chandler, Aug 17 2011

Examples

			k=21 -> (78*10^21 - 87)/99 = 787878787878787878787.

Links

Crossrefs

Cf. A062209-A062232, A059758, A032758.

Extensions

Edited by Ray Chandler, Aug 17 2011

A062226 Numbers k such that the smoothly undulating palindromic number (79*10^k - 97)/99 is a prime.

Original entry on oeis.org

3, 357, 537, 1677, 3057, 51663, 66447
Offset: 1

Views

Author

Patrick De Geest and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001

Keywords

Comments

Prime versus probable prime status and proofs are given in the author's table.
No further terms < 100000. - Ray Chandler, Aug 17 2011

Examples

			k=357 -> (79*10^357 - 97)/99 = 7979797...7979797.

Links

Crossrefs

Cf. A062209-A062232, A059758, A032758.

Extensions

a(6)=51663 from Ray Chandler, Nov 11 2010
a(7)=66447 from Ray Chandler, Jan 30 2011
Edited by Ray Chandler, Aug 17 2011

A062227 Numbers k such that the smoothly undulating palindromic number (91*10^k - 19)/99 is a prime.

Original entry on oeis.org

3, 9, 11, 17, 23, 25229
Offset: 1

Views

Author

Patrick De Geest and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001

Keywords

Comments

Prime versus probable prime status and proofs are given in the author's table.
No further terms < 100000. - Ray Chandler, Aug 17 2011

Examples

			k=23 -> (91*10^23 - 19)/99 = 91919191919191919191919.

Links

Crossrefs

Cf. A062209-A062232, A059758, A032758.

Extensions

Edited by Ray Chandler, Aug 17 2011

A062228 Numbers k such that the smoothly undulating palindromic number (92*10^k - 29)/99 is a prime.

Original entry on oeis.org

3, 9, 195, 515, 857, 11393
Offset: 1

Views

Author

Patrick De Geest and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001

Keywords

Comments

Prime versus probable prime status and proofs are given in the author's table.
No further terms < 100000. - Ray Chandler, Aug 17 2011

Examples

			k=9 -> (92*10^9 - 29)/99 = 929292929.

Links

Crossrefs

Cf. A062209-A062232, A059758, A032758.

Extensions

Edited by Ray Chandler, Aug 17 2011

A062229 Numbers k such that the smoothly undulating palindromic number (94*10^k - 49)/99 is a prime.

Original entry on oeis.org

5, 17, 65, 143, 551, 92981
Offset: 1

Views

Author

Patrick De Geest and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001

Keywords

Comments

Prime versus probable prime status and proofs are given in the author's table.
No further terms < 100000. - Ray Chandler, Aug 17 2011

Examples

			k=17 -> (94*10^17 - 49)/99 = 94949494949494949.

Links

Crossrefs

Cf. A062209-A062232, A059758, A032758.

Extensions

a(6) from Ray Chandler, Jul 29 2011
Edited by Ray Chandler, Aug 17 2011

A062230 Numbers k such that the smoothly undulating palindromic number (95*10^k - 59)/99 is a prime.

Original entry on oeis.org

5, 17, 209, 1295
Offset: 1

Views

Author

Patrick De Geest and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001

Keywords

Comments

Prime versus probable prime status and proofs are given in the author's table.
No further terms < 100000. - Ray Chandler, Aug 17 2011

Examples

			k=17 -> (95*10^17 - 59)/99 = 95959595959595959.

Links

Crossrefs

Cf. A062209-A062232, A059758, A032758.

Extensions

Edited by Ray Chandler, Aug 17 2011

A085112 Palindromic primes with at least 3 digits in which the absolute difference of successive digits is identical.

Original entry on oeis.org

101, 131, 151, 181, 191, 313, 353, 373, 383, 727, 757, 787, 797, 919, 929, 14741, 18181, 32323, 34543, 35353, 35753, 72727, 74747, 78787, 94949, 95959, 97579, 1212121, 1616161, 3135313, 3212123, 7654567, 159595951, 323232323, 345656543
Offset: 1

Views

Author

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jul 04 2003

Keywords

Comments

Different from A059758. 14741 which is a member of this sequence, is not a member of A059758.

Examples

			94949 is a member with the difference between every pair of successive digits = 5.
34543 is also a member with the absolute difference 1.

Crossrefs

Cf. A059758.

Extensions

More terms from David Wasserman, Jan 27 2005
Previous Showing 21-28 of 28 results.

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

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