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A113721
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Concatenation of the numbers of equal successive digits of previous two terms read in inverse order, starting with a(1)=a(2)=1.
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1
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1, 1, 2, 11, 21, 112, 131, 11112, 1511, 21114, 131211, 21111131, 115121111, 41113151, 11113141112, 13111511131, 1131311131114, 13131113131311, 2111113111113131112, 13111515121111131111, 41511111311131115151
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OFFSET
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1,3
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LINKS
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EXAMPLE
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As a(5)=112 and a(6)=131, their digits in inverse order are 131211 and that is (1) 1 followed by (1) 3, (1) 1, (1) 2 and (2) 1's, so a(7) = 11112.
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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