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A323477 Successive generations of A306211, in compressed notation. 4
1, 11, 112, 11221, 11221221, 1122122122121, 1122122122121221212111, 1122122122121221212111221212111211113, 1122122122121221212111221212111211113221212111211113211113141 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

"Compressed" means the separating commas have been omitted. This will only work as long as the terms of A306211 are at most 9.  However, we know from Chaffin's work (see A306211) that this is true at least for the first 10228800161220 terms of A306211.

LINKS

Table of n, a(n) for n=1..9.

MATHEMATICA

s[n_] := If[n == 1, {1}, s[n] = Join[s[n-1], Length /@ Split[s[n-1]]]];

a[n_] := FromDigits[s[n]];

Array[a, 9] (* Jean-Fran├žois Alcover, Feb 24 2021 *)

CROSSREFS

Cf. A306211, A306215 (lengths), A323478 (increments).

Sequence in context: A024145 A053055 A024148 * A175684 A090227 A050758

Adjacent sequences:  A323474 A323475 A323476 * A323478 A323479 A323480

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, Jan 31 2019

STATUS

approved

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Last modified August 1 17:43 EDT 2021. Contains 346402 sequences. (Running on oeis4.)