56632576domain: NAppears in sequencesNumber of walks on square lattice. Column y=3 of A052174.at n=13A005561a(1) = 13; for n > 0, a(n+1) = a(n) * sum of digits of a(n).at n=6A047903Horadam sequence (0,1,6,4).at n=12A085939