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 1-2 of 2 results.

A225333 Look-and-repeat: similar to look-and-say except frequency is repeated (seed 2).

Original entry on oeis.org

2, 112, 221112, 222331112, 332223331112, 223332333331112, 222333112553331112, 332333221112225333331112, 223112333222331332115553331112, 222113221112333332223111223112221335333331112
Offset: 1

Views

Author

Jean-Christophe Hervé, May 12 2013

Keywords

Comments

Look-and-repeat sequence A225329 with seed 2.
Contains 1, 2, 3 and 5, but not 4.
All terms end with 2 (the seed) and, starting at the fourth, with 3331112, which makes the 5 appear.
All terms except the second begin with 2 or 3; this is a direct consequence of the look-and-repeat rule.

Examples

			The term after 112 is obtained by saying (repeating) two two 1, one one 2, which gives 221112.

Crossrefs

Cf. A225329 (seed one), A225332 (continuous look-and-repeat, seed 2), A225330, A225331 (continuous look-and-repeat, seed 1).
Cf. A005150 (original look-and-repeat), A225224, A221646, A225212 (continuous look-and-repeat versions).

A225334 Look-and-repeat: similar to look-and-say except frequency is repeated (seed 3).

Original entry on oeis.org

3, 113, 221113, 222331113, 332223331113, 223332333331113, 222333112553331113, 332333221112225333331113, 223112333222331332115553331113, 222113221112333332223111223112221335333331113
Offset: 1

Views

Author

Jean-Christophe Hervé, May 12 2013

Keywords

Comments

Look-and-repeat sequence A225329 with seed 3.
Contains 1, 2, 3 and 5, but not 4.
All terms end with 3 (the seed) and, starting at the fourth, with 3331113, which makes the 5 appear.
All terms except the second begin with 2 or 3; it is a direct consequence of the look-and-repeat rule.
Sequence A225333, the look-and-repeat sequence with seed 2 is almost the same, differing only in the last digit of each term (2 instead of 3 here). Indeed, any one-digit seed except 1 leads to essentially the same sequence with all terms identical except the last one = the seed.

Examples

			The term after 113 is obtained by saying (repeating) two two 1, one one 3, which gives 221113.

Crossrefs

Cf. A225329 (seed one), A225333 (seed two), A225332 (continuous look-and-repeat, seed 2), A225330, A225331 (continuous look-and-repeat, seed 1).
Cf. A005150 (original look-and-say), A225224, A221646, A225212 (continuous look-and-say versions).

Formula

a(n) = A225333(n) + 1.
Showing 1-2 of 2 results.

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

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