100130

Appears in sequences

• Numbers n such that sigma(n) = 6*phi(n).at n=16A104900
• Suppose you take the ten digits 0..9, arrange them in any order and then either concatenate adjacent ones or separate them with a plus or minus sign, e.g., 98-76+5-4-32+10 or 9-8-765+3041-2. The first expression totals to "1", the second example totals to "2275". This sequence lists the positive integers that cannot be expressed in this way.at n=28A108224
• a(n) is the least number having sum of digits n in base 10 and also exactly n distinct prime factors.at n=3A113760
• Numbers k such that digit sum of k = number of distinct prime factors of k.at n=31A285494