152168

Appears in sequences

• a(n) = Sum_{i=0..n} T(i,n-i) where T is given by A047020.at n=19A047021
• Let s(k) denote the sum of the even proper divisors of k. The sequence lists the pairs of numbers (x, y) such that s(x) = y and s(y) = x.at n=22A279812
• List of ordered pairs (x, y) from A279812.at n=17A279950