293866domain: NAppears in sequencesRow sums of A175105.at n=13A176084Number of associative, quasitrivial, and order-preserving binary operations on the n-element set {1,...,n}.at n=13A293005G.f.: Sum_{n>=0} (n+1)*(n+2)/2 * x^n * (1 + x^n)^n.at n=75A326003