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%I #12 Nov 06 2019 17:52:45
%S 0,0,1,2,3,4,5,6,7,8,9,10,0,11,1,12,2,13,3,14,4,15,5,16,6,17,7,18,8,
%T 19,9,20,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,
%U 30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50
%N a(n) is the number of entries from a(0) to a(n-2) that have the same number of digits as a(n-1), with a(0) = 0.
%H Scott R. Shannon, <a href="/A329079/a329079.png">Plot of a(n) for n = 1..10000</a>.
%H Scott R. Shannon, <a href="/A329079/a329079_1.png">Plot of a(n) for n = 1..1000000</a>. Note how this is self-similar to the plot for n = 1 to 10000.
%e a(1) = 0 as there are no entries before a(0).
%e a(2) = 1 as a(1) = 0 has one digit, and there is one previous entry before a(1) that has one digit.
%e a(12) = 0 as a(11) = 10 has two digits, and there are no previous entries before a(11) that have two digits.
%e a(13) = 11 as a(12) = 0 has one digit, and there are eleven previous entries before a(12) that have one digit.
%Y Cf. A007953, A162146, A327246.
%K nonn,base
%O 0,4
%A _Scott R. Shannon_, Nov 04 2019
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