A135604 - OEIS

A135604

Self-describing sequence: 1 even digit between two odd, then 2 even digits between two odd, then 3 even digits, then 4, then 6... The length of each run of even digits is given by the sequence itself (the smallest available integer is used when needed). Zero is an even digit.

%I #2 Mar 30 2012 18:49:53

%S 1,2,3,4,6,7,8,20,30,40,41,42,44,46,50,60,62,64,70,82,84,85,86,88,200,

%T 202,204,206,208,210,220,222,224,226,228,240,242,244,246,248,250,260,

%U 262,264,266,268,280,282,284,286,288

%N Self-describing sequence: 1 even digit between two odd, then 2 even digits between two odd, then 3 even digits, then 4, then 6... The length of each run of even digits is given by the sequence itself (the smallest available integer is used when needed). Zero is an even digit.

%e Runs of even digits are between brackets:

%e Seq: 1,(2),3,(4,6,)7,(8,20,)3(0,40,4)1,(42,44,46,)5(0,60,62,64,)70,...

%e Runs:...1......2........3........4..........6............7.. = sequence itself.

%Y Cf. A114148, A114149

%K base,nonn

%O 1,2

%A _Eric Angelini_, Feb 26 2008