

A022508


Describe previous term from the right (method A  initial term is 4).


3




OFFSET

0,1


COMMENTS

Method A = 'frequency' followed by 'digit'indication.


LINKS

Table of n, a(n) for n=0..9.


EXAMPLE

E.g. the term after 1411 is obtained by saying "two 1's, one 4, one 1", which gives 211411.


MATHEMATICA

A022508[1]:=4; A022508[n_]:=A022508[n]=FromDigits[Flatten[{Length[#], First[#]}&/@Split[Reverse[IntegerDigits[A022508[n1]]]]]]; Map[A022508, Range[15]] (* Peter J. C. Moses, Apr 22 2013 *)


CROSSREFS

Cf. A022506, A006711, A022482, A022507A022513.
Sequence in context: A001140 A177363 A138488 * A161741 A186509 A323085
Adjacent sequences: A022505 A022506 A022507 * A022509 A022510 A022511


KEYWORD

nonn,base,easy,nice


AUTHOR

N. J. A. Sloane.


EXTENSIONS

More terms from Erich Friedman.


STATUS

approved



