Number of n-digit terms in A333369.

Terms

a(0) =5a(1) =24a(2) =130a(3) =792a(4) =5080a(5) =34584a(6) =247360a(7) =1817112a(8) =13918720a(9) =108848664a(10) =869866240a(11) =7169995032a(12) =59085276160a(13) =505735077144