152628

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=20A066573
• Triangular numbers in which the k-th significant digit either divides k or is a multiple of k.at n=34A069559
• a(n) = n*(n+1)*(n^2+n+1)/2.at n=23A110450