%I A001369
%S A001369 1,23,456,7891,1234,567891,123456,78910123,456789101,2345678910,
%T A001369 12345678910,123456789101,2345678910123,45678910123456,
%U A001369 789101234567891,123456789101234
%N A001369 Blocks of increasing length using 1,2,3,...,9,10; omit leading 0's.
%Y A001369 Sequence in context: A076068 A062273 A066547 this_sequence A007923 A080479 
               A053067
%Y A001369 Adjacent sequences: A001366 A001367 A001368 this_sequence A001370 A001371 
               A001372
%K A001369 nonn,base
%O A001369 1,2
%A A001369 N. J. A. Sloane (njas(AT)research.att.com).