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 1-4 of 4 results.

A082598 Palindromic prime units W appearing twice in first-order fractal palindromic primes WmW.

Original entry on oeis.org

3, 7, 11, 131, 151, 191, 919, 10301, 10501, 10601, 12421, 12721, 13331, 13831, 13931, 14341, 15551, 16061, 16361, 16561, 17471, 18481, 19391, 30203, 30403, 30703, 31513, 32323, 32423, 33533, 34543, 35053, 35153, 35753, 36263, 37273, 37573, 38783, 39293, 70207
Offset: 1

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Author

Lekraj Beedassy, May 14 2003

Keywords

Comments

Note that W may not be further split in this manner (see A082584). - Michael S. Branicky, May 19 2024

Examples

			10301 is in the sequence because this palindromic prime builds up the first order palindromic prime 10301110301.

Links

Crossrefs

Cf. A082584.

Extensions

a(27) and beyond from Michael S. Branicky, May 19 2024

A082599 Palindromic prime units W appearing four times in second-order fractal palindromic primes WxWmWxW, where part WxW is also a palindromic prime.

Original entry on oeis.org

3, 7, 11, 131, 151, 919, 10301, 10501, 10601, 12421, 13331, 13931, 14341, 16061, 16561, 30203, 30403, 30703, 32323, 32423, 33533, 35053, 35153, 36263, 37573, 39293, 71917, 72727, 73637, 76367, 78487, 79697, 90709, 91019, 96469, 97379, 98389, 1035301, 1043401
Offset: 1

Views

Author

Lekraj Beedassy, May 14 2003

Keywords

Comments

Note also that W may not be further split in this manner (see A082584). - Michael S. Branicky, May 19 2024

Examples

			919 is in the sequence because this palindromic prime builds up the second order fractal palindromic prime 919691979196919.

Links

Crossrefs

Cf. A002385, A082584, A082598, A082600.

Extensions

Name updated and a(19) and beyond from Michael S. Branicky, May 19 2024

A067899 Fractal palindromic primes of second order.

Original entry on oeis.org

3135313, 3732373, 3836383, 7276727, 7278727, 7576757, 7873787, 7977797, 11311511311, 11411311411, 13331113331, 13331713331, 13831913831, 13931413931, 17471317471, 19391319391, 31513531513, 31513831513, 31513931513, 37273937273, 37573237573, 37573337573
Offset: 1

Views

Author

Lekraj Beedassy, May 13 2003

Keywords

Examples

			11411311411 is a palindromic prime in the sequence because about the middle 3, either wing 11411 is itself a palindromic prime, further made up, about a middle 4, of wings 11, another palindromic prime.

Links

Crossrefs

Cf. A082584, A082599.

Extensions

a(11) onward corrected by Sean A. Irvine, Jan 12 2024

A082589 Fractal palindromic primes of third order.

Original entry on oeis.org

313531363135313, 727672777276727, 797779777977797, 11411311411511411311411, 10301110301310301110301210301110301310301110301
Offset: 1

Views

Author

Lekraj Beedassy, May 13 2003

Keywords

Comments

A third-order fractal palindromic prime is of the form W*W_W*W.W*W_W*W, where parts W*W_W*W, W*W and W are all palindromic primes and the symbols ., _, * stand for central digits; W may not be further split in this manner into shorter palindromic primes.

Crossrefs

Cf. A082584, A082600.
Showing 1-4 of 4 results.

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

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