A107277 If n <= 1 then n else smallest number having in decimal representation exactly one common digit with its predecessor but none with its pre-predecessor.

0, 1, 12, 20, 30, 31, 41, 42, 52, 53, 63, 64, 74, 75, 85, 86, 96, 97, 107, 122, 233, 300, 401, 422, 523, 560, 611, 712, 730, 804, 811, 912, 930, 3444, 4111, 5001, 5222, 6233, 6400, 7011, 7222, 8233, 8400, 9011, 9222, 23333, 30000, 40111, 42222, 52333, 56000