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%I #4 Mar 31 2017 21:11:36
%S 3,4,5,4,5,6,7,5,6,7,8,9,4,5,6,7,5,6,7,8,9,6,7,8,9,10,11,7,8,9,10,11,
%T 12,13,5,6,7,8,9,6,7,8,9,10,11,7,8,9,10,11,12,13,8,9,10,11,12,13,14,
%U 15,9,10,11,12,13,14,15,16,17,4,5,6,7,5,6,7,8,9,6,7,8,9,10,11,7,8,9,10,11,12
%N A self-descriptive fractal sequence. Each element gives the length and first element of a finite arithmetic sequence. Replace each finite sequence with its length (or first term) and you recover the original infinite sequence.
%e The first element is 3, which describes the sequence 3, 4, 5. The second element, 4, describes the run 4, 5, 6, 7.
%Y Cf. A114544, A114546, A114547.
%K easy,nonn
%O 3,1
%A _Kerry Mitchell_, Dec 07 2005