%N Prefix overlap of dictionary consisting of decimal expansions of 0 through n.
%C The prefix overlap between two words is the length of their longest common prefix.
%C The prefix overlap of a dictionary is the sum of the prefix overlaps between successive words.
%C Partial sums of A076489.
%C More than the usual number of terms are displayed in order to distinguish this from some closely related sequences.
%H Rodica Simion and Herbert S. Wilf, <a href="https://doi.org/10.1137/0607054">The distribution of prefix overlap in consecutive dictionary entries</a>, SIAM J. Algebraic Discrete Methods, 7(1986), no. 3, 470--475. MR0844051.
%Y Cf. A238845, A239091, A076489.
%Y Different from A081600 and A028904.
%A _N. J. A. Sloane_, Mar 22 2014