Number of n-digit terms in A377912.

Terms

a(0) =10a(1) =66a(2) =489a(3) =3631a(4) =26951a(5) =200045a(6) =1484850a(7) =11021410a(8) =81807240a(9) =607220362a(10) =4507138581a(11) =33454573430a(12) =248319075015