A101402(10^n).

Terms

a(0) =1a(1) =4a(2) =36a(3) =355a(4) =3549a(5) =35495a(6) =354942a(7) =3549413a(8) =35494123a(9) =354941215a(10) =3549412151a(11) =35494121507a(12) =354941215066