Initial terms of sequences for various bases b (modulo copy-paste errs ;)) b a(1) 2 0 3 9 (A167819) 4 1030 5 1953938 6 78366189010 7 79792379381889683 8 2417851803937356928403822 9 2503155512261972404094957713855924 10 100000000011111112222222333333444445555666778 Zak