76501

Appears in sequences

• Stopping times.at n=14A007186
• Pentagonal numbers (A000326) that are also brilliant numbers (A078972).at n=12A113941
• Pentagonal numbers (A000326) whose digit reversal is a prime.at n=29A115707
• Smallest number m such that prime(n) is a factor of both m and sigma(m).at n=29A156099
• Semiprimes of the form n*(3*n-1)/2.at n=26A245365
• Pentagonal numbers (A000326) in which parity of digits alternates.at n=28A297644
• Semiprimes of the form p(6p - 1).at n=16A330409
• a(n) = 6*binomial(n,4) + 2*binomial(n,2) + 1.at n=25A341703