%I A138342
%S A138342 1,9,1,89,1,9,1,889,1,9,1,89,1,9,1,8889,1,9,1,89,1,9,1,889,1,9,1,89,1,
               9,
%T A138342 1,88889,1,9,1,89,1,9,1,889,1,9,1,89,1,9,1,8889,1,9,1,89,1,9,1,889,1,9,
%U A138342 1,89,1,9,1,888889,1,9,1,89,1,9,1,889,1,9,1,89,1,9,1,8889,1,9,1,89,1,9
%N A138342 First differences of A007088.
%F A138342 S[n] = A059482[A007814[n]] The nth element corresponds to element of 
               A059482 at the position indicated by the value of the nth element 
               of A007814.
%e A138342 1-0 = 1, 10-1 = 9, 11-10 = 1, 100-11 = 89 ...
%Y A138342 Cf. A007814, A059482.
%Y A138342 Sequence in context: A050303 A038291 A075504 this_sequence A101678 A051380 
               A136238
%Y A138342 Adjacent sequences: A138339 A138340 A138341 this_sequence A138343 A138344 
               A138345
%K A138342 nonn
%O A138342 0,2
%A A138342 Jaume Simon Gispert (jaume(AT)nuem.com), May 17 2008