A032571 Base 20 value of decimal denominator divided by this decimal value (n) is an integer.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 195, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1280, 1320, 1898, 1948, 1950, 2000, 2640, 3000, 3960, 4000, 5000, 6000, 7000, 8000, 9000, 10000, 12800, 13200, 15545, 16000