645645

Appears in sequences

• Products of 6 distinct odd primes.at n=16A168352
• Least k with precisely n partitions k = x + y satisfying x > 0 and k' = x' + y', where k', x', y' are the arithmetic derivatives of k, x, y.at n=19A212664
• Number of length 6 0..n arrays least squares fitting to a zero slope straight line, with a single point taken as having zero slope.at n=19A245136
• Odd abundant numbers that are also doublets (cf. A020338).at n=31A380232