9921875

Appears in sequences

• Smallest number with exactly n prime factors (possibly with repetitions) such that in binary representation the divisors >1 form a prefix code.at n=8A088862
• String of digits encountered in decimal expansion of successive ratios k/(k+1), treating only non-repeating expansions, with decimal point and leading and trailing zeros removed.at n=15A156703
• Monotonic ordering of nonnegative differences 10^i-5^j, for 40>= i>=0, j>=0.at n=37A192202
• a(n) = 10^n - 5^n.at n=7A248340