1,2
1->One 1->11; 11->102->One 1, One 0, One 2->111012; 111012->12122021120 etc.
Cf. A005150.
Sequence in context: A055322 A110780 A087395 this_sequence A079558 A111478 A055311
Adjacent sequences: A049190 A049191 A049192 this_sequence A049194 A049195 A049196
nonn,base
Olivier Gerard (ogerard(AT)ext.jussieu.fr).
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