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 1-5 of 5 results.

A117777 Total number of palindromic primes in base 4 below 4^n.

Original entry on oeis.org

2, 3, 6, 6, 16, 16, 45, 45, 142, 142, 435, 435, 1417, 1417, 4802, 4802, 16433, 16433, 57808, 57808, 210708, 210708, 752233, 752233, 2748264, 2748264, 10211513, 10211513, 38013234, 38013234, 140417288, 140417288
Offset: 1

Views

Author

Martin Renner, Apr 15 2006

Keywords

Comments

Every palindrome with an even number of digits is divisible by 11 (in base 4) and therefore is composite (not prime). Hence there is only one palindromic prime with an even number of digits.

Links

Crossrefs

Partial sums of A117778.
Cf. A029972, A117699.
Cf. A117772, A117775, A117779, A117781, A117783, A117785, A117787.

Extensions

a(13)-a(32) from the data at A117778 added by Amiram Eldar, Mar 21 2021

A117779 Total number of palindromic primes in base 5 below 5^n.

Original entry on oeis.org

2, 2, 7, 7, 25, 25, 83, 83, 243, 243, 1038, 1038, 4205, 4205, 17724, 17724, 78553, 78553, 349246, 349246, 1526658, 1526658, 7028772, 7028772, 32055014, 32055014, 146939924, 146939924
Offset: 1

Views

Author

Martin Renner, Apr 15 2006

Keywords

Comments

Every palindrome with an even number of digits is divisible by 11 (in base 5) and therefore is composite (not prime). Hence there is no palindromic prime with an even number of digits.

Links

Crossrefs

Partial sums of A117780.
Cf. A029973, A117700.
Cf. A117772, A117775, A117777, A117781, A117783, A117785, A117787.

Extensions

a(11)-a(28) from the data at A117780 added by Amiram Eldar, Mar 21 2021

A117781 Total number of palindromic primes in base 6 below 6^n.

Original entry on oeis.org

3, 4, 10, 10, 31, 31, 126, 126, 571, 571, 2752, 2752, 14248, 14248, 73971, 73971, 389920, 389920, 2108414, 2108414, 11512078, 11512078
Offset: 1

Views

Author

Martin Renner, Apr 15 2006

Keywords

Comments

Every palindrome with an even number of digits is divisible by 11 (in base 6) and therefore is composite (not prime). Hence there is only one palindromic prime with an even number of digits.

Links

Crossrefs

Partial sums of A117782.
Cf. A029974, A117701.
Cf. A117772, A117775, A117777, A117779, A117783, A117785, A117787.

Extensions

a(11)-a(22) from the data at A117782 added by Amiram Eldar, Mar 21 2021

A117783 Total number of palindromic primes in base 7 below 7^n.

Original entry on oeis.org

3, 3, 9, 9, 50, 50, 204, 204, 1135, 1135, 6086, 6086, 36018, 36018, 216932, 216932, 1306070, 1306070, 8129138, 8129138, 51773946, 51773946, 326701423, 326701423
Offset: 1

Views

Author

Martin Renner, Apr 15 2006

Keywords

Comments

Every palindrome with an even number of digits is divisible by 11 (in base 7) and therefore is composite (not prime). Hence there is no palindromic prime with an even number of digits.

Links

Crossrefs

Partial sums of A117784.
Cf. A029975, A117702.
Cf. A117772, A117775, A117777, A117779, A117781, A117785, A117787.

Extensions

a(9)-a(24) from the data at A117784 added by Amiram Eldar, Mar 21 2021

A117787 Total number of palindromic primes in base 9 below 9^n.

Original entry on oeis.org

4, 4, 17, 17, 81, 81, 499, 499, 3416, 3416, 24255, 24255, 181998, 181998, 1428698, 1428698, 11139859, 11139859, 89160415, 89160415
Offset: 1

Views

Author

Martin Renner, Apr 15 2006

Keywords

Comments

Every palindrome with an even number of digits is divisible by 11 (in base 9) and therefore is composite (not prime). Hence there is no palindromic prime with an even number of digits.

Links

Crossrefs

Partial sums of A117788.
Cf. A029977, A117703.
Cf. A117772, A117775, A117777, A117779, A117781, A117783, A117785.

Extensions

a(9)-a(20) from the data at A117788 added by Amiram Eldar, Mar 21 2021
Showing 1-5 of 5 results.

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

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