A248335 A recursive sequence generated by an L-system defined in comments.

1, 23, 3445, 45565667, 5667677867787889, 6778788978898990788989908990901, 7889899089909018990901901112899090190111290111211223, 89909019011129011121122390111211223112232323349011121122311223232334112232323342323343445

Offset

1,2

Comments

The L-system producing the sequence is defined as follows:

Alphabet: 1 2 3 4 5 6 7 8 9 0

Initiator: 1

Production rules: (1 --> 23), (2 --> 34), (3 --> 45), (4 --> 56), (5 --> 67), (6 --> 78), (7 --> 89), (8 --> 90), (9 --> 1), (0 --> 12).

Links

Table of n, a(n) for n=1..8.

Felix Fröhlich, C++ program for this sequence

Wikipedia, L-system

Crossrefs

Cf. A057985, A073058, A103684.

Sequence in context: A136363 A340330 A290786 * A222031 A233143 A134798

Adjacent sequences: A248332 A248333 A248334 * A248336 A248337 A248338

Keyword

nonn,base

Author

Felix Fröhlich, Oct 26 2014

Status

approved