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A334027 "Look and say" the concatenated exponents in the prime factorization of n.

%I A334027 #13 Feb 16 2025 08:34:00
%S A334027 10,11,11,12,11,21,11,13,12,21,11,1211,11,21,21,14,11,1112,11,1211,21,
%T A334027 21,11,1311,12,21,13,1211,11,31,11,15,21,21,21,22,11,21,21,1311,11,31,
%U A334027 11,1211,1211,21,11,1411,12,1112,21,1211,11,1113,21,1311,21,21,11,1221,11
%N A334027 "Look and say" the concatenated exponents in the prime factorization of n.
%H A334027 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/LookandSaySequence.html">Look and Say Sequence</a>
%H A334027 Wikipedia, <a href="http://en.wikipedia.org/wiki/Look-and-say_sequence">Look-and-say sequence</a>
%F A334027 a(n) = A045918(A037916(n)).
%e A334027 2 = 2^1 and there is one 1, so a(2) = 11.
%e A334027 3 = 3^1 and there is one 1, so a(3) = 11.
%e A334027 4 = 2^2 and there is one 2, so a(4) = 12.
%e A334027 5 = 5^1 and there is one 1, so a(5) = 11.
%e A334027 6 = 2^1*3^1 and there are two 1's, so a(6) = 21.
%e A334027 7 = 7^1 and there is one 1, so a(7) = 11.
%e A334027 8 = 2^3 and there is one 3, so a(8) = 13.
%e A334027 9 = 3^2 and there is one 2, so a(9) = 12.
%e A334027 10 = 2^1*5^1 and there are two 1's, so a(10) = 21.
%Y A334027 Cf. A037916, A045918.
%K A334027 nonn,base
%O A334027 1,1
%A A334027 _Wesley Ivan Hurt_, Apr 12 2020