37213domain: NAppears in sequencesNumber of partitions of n such that the set of parts has an even number of elements.at n=44A092306Numbers n such that phi(sigma(n)) = sigma(n) - phi(n).at n=12A230372a(n) = n*(67*n - 89)/2.at n=34A263227Number of compositions of n with distinct circular differences.at n=22A325551