283328

Appears in sequences

• Number of base pyramids in all dispersed Dyck paths of length n (i.e., in all Motzkin paths of length n with no (1,0)-steps at positive heights).at n=19A191394
• 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=32A279812
• List of ordered pairs (x, y) from A279812.at n=32A279950