83282

Appears in sequences

• Pairs (x, y), x < y, of f-amicable numbers where f(k) = floor(|k*sin(k)|) sorted by increasing y, then increasing x; f-amicable numbers are defined in A066511.at n=18A066573
• a(n) = Sum_{d|n} phi(n/d)^(d-1).at n=44A164941