78372domain: NAppears in sequencesa(n) = 100*n^2 - n.at n=27A157659a(n) = 400*n^2 - 2*n.at n=13A158316a(n) = 784*n^2 - 28.at n=9A158657Expansion of e.g.f. 1/(1 - x * exp(x * (exp(x) - 1))).at n=7A362245Number of edge covers of fan graph F_{2,n}.at n=5A380461