A130890 Number of terms of A061681 having length = n in decimal representation.
4, 23, 281, 2825, 28287, 282890, 2828964, 28289682, 282896825
Offset: 1
Examples
a(1)=#{1,2,4,8}=4;
a(2)=#{16,17,18,19,20,22,24,26,28,30,33,36,39,42,46,50,55,60,66,72,79,86,94}=23.
Comments