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A155885 "Look and Say" applied to the whole sequence so far. 0
22, 3233, 424344, 52535455, 6263646566, 727374757677, 82838485868788, 9293949596979899 (list; graph; refs; listen; history; text; internal format)



a(1)=22 says "there are two 2's so far in the sequence (including my own digits)": this is true; a(2) says "there are three 2's and three 3's so far in the sequence (including my own digits)": this is true if we add the two 2's of a(1) to the unique 2 of a(2) and if we count the three 3's of a(2); etc. The sequence is finite (because there is no clear convention in noting more than 9 digits "d" under the traditional Look and Say rule; M. F. Hasler suggests for instance, that the next term could be [omitting the spaces]: 7 0 12 1 11 2 10 3 10 4 10 5 10 6 11 7 10 8 10 9).


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


Look and Say: A005150

Sequence in context: A200805 A128854 A114942 * A218719 A109776 A110802

Adjacent sequences:  A155882 A155883 A155884 * A155886 A155887 A155888




Eric Angelini, Jan 29 2009



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Last modified May 16 08:07 EDT 2021. Contains 343940 sequences. (Running on oeis4.)