Number of terms of A100873 less than 10^n.

Terms

a(0) =0a(1) =0a(2) =1a(3) =6a(4) =29a(5) =68a(6) =156a(7) =381a(8) =974a(9) =2406a(10) =5717a(11) =13521a(12) =32431a(13) =78238a(14) =189831a(15) =464411a(16) =1150499a(17) =2881028a(18) =7289744