Concatenation of the numbers of equal successive digits of previous two terms, starting with a(1)=a(2)=1.
A113720
Concatenation of the numbers of equal successive digits of previous two terms, starting with a(1)=a(2)=1.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =11a(4) =12a(5) =31a(6) =1111a(7) =15a(8) =51a(9) =121a(10) =1211a(11) =11212a(12) =114111a(13) =2111213a(14) =21313111a(15) =13111111113a(16) =111114181a(17) =118151111a(18) =5111131114a(19) =2111414131
External references
- oeis: A113720