a(n) is the string of integers S(n) concatenated together with no commas, where S(1)=1; for even n, S(n) = S(n-1),n; and for odd n>1, S(n) is obtained by adding 1 to every entry of S(n-1) and appending 1.

A171093

a(n) is the string of integers S(n) concatenated together with no commas, where S(1)=1; for even n, S(n) = S(n-1),n; and for odd n>1, S(n) is obtained by adding 1 to every entry of S(n-1) and appending 1.