413344domain: NAppears in sequencesa(n) = 7*3^n + 1.at n=10A199110a(n) = 7*9^n + 1.at n=5A199567Automorphic numbers: n^2 ends with n in base 18 (written in base 10).at n=10A201948Number of endofunctions on [n] whose cycle lengths are triangular numbers.at n=7A305824