107783domain: NAppears in sequencesSum of proper divisors minus the number of proper divisors of the number of partitions of n, A000041(n).at n=46A152987Sequence with a (1,2) Somos-4 Hankel transform.at n=22A178074Number of compositions (ordered partitions) of n into Jacobsthal numbers 1,3,5,11,21,43, ... (A001045).at n=27A357519