a(n) is the number of n-digit terms in A387866.

A387867

a(n) is the number of n-digit terms in A387866.

Terms

    a(0) =0a(1) =9a(2) =46a(3) =503a(4) =6252a(5) =84201a(6) =1105270a(7) =14040589a(8) =172462528a(9) =2059008115

External references