145540domain: NAppears in sequencesNumber of loopless tree-rooted planar maps with 3 vertices and n faces and no isthmuses.at n=18A006428Number of (w,x,y,z) with all terms in {0,...,n} and |w-x|<|x-y|<|y-z|.at n=30A212902Smallest m >= 2*n such that binomial(m,n) is a multiple of m-i for all 0<=i<n, but one.at n=19A389360