52997domain: NAppears in sequencesExpansion of (1/((1-4x)c(x)))/(1-x^2c(x)/sqrt(1-4x)), c(x) the g.f. of A000108.at n=8A113956Number of representations of the n-th factorial group as a (nondecreasing) product of (nontrivial) cyclic groups.at n=12A226356