A343837 - OEIS

%I #5 May 01 2021 06:50:19

%S 1,11,1112,11121321,11121321132111312111,

%T 1112132113211131211113211131211231211331112113

%N Describe all the previous terms (previous terms are described one by one in succession; method - digit-indication followed by frequency, initial term is 1).

%C The next term is too large to include.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/LookandSaySequence.html">Look and Say Sequence</a>

%e a(4) is obtained by saying "1 once; 1 twice; 1 thrice, 2 once", which gives 11121321.

%Y Cf. A005150, A007651, A045981, A045982, A060857, A343838.

%K nonn,base,easy

%O 1,2

%A _Ilya Gutkovskiy_, May 01 2021