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A022511 Describe previous term from the right (method A - initial term is 7). 2
7, 17, 1711, 211711, 21172112, 122112172112, 122112171112212211, 2122112231171112212211, 21221122311721132221221112, 12312211321321121721132221221112 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
COMMENTS
Method A = 'frequency' followed by 'digit'-indication.
LINKS
Michael De Vlieger, Table of n, a(n) for n = 0..21
EXAMPLE
The term after 1711 is obtained by saying "two 1's, one 7, one 1", which gives 211711.
MATHEMATICA
NestList[FromDigits@ Flatten@ Map[Reverse@ Flatten@ Tally[#] &, Split@ Reverse@ IntegerDigits[#]] &, 7, 9] (* Michael De Vlieger, Dec 16 2021 *)
CROSSREFS
Sequence in context: A093139 A177366 A138491 * A113613 A070415 A034083
KEYWORD
nonn,base,easy,nice
AUTHOR
EXTENSIONS
More terms from Erich Friedman
STATUS
approved

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Last modified February 24 10:26 EST 2024. Contains 370294 sequences. (Running on oeis4.)