271979

Appears in sequences

• a(n) is the smallest m for which the decimal representation of 2^m contains n consecutive identical digits.at n=10A045875
• Denominator of next-best approximation to harmonic numbers. a(n) = Denominator of (A055573(n)-1)th convergent of n-th harmonic number, Sum_{k=1..n} 1/k.at n=17A113124
• Exponent of least power of 2 having exactly n consecutive 6's in its decimal representation.at n=11A131540