81310473domain: NAppears in sequencesNumber of ternary trees (A001764) with n nodes and maximal diameter.at n=15A0640179th binomial transform of (1,1,0,0,0,0,0,...).at n=8A081109Main diagonal of array A089944, in which the n-th row is the n-th binomial transform of the natural numbers.at n=8A089945a(n) = 17*3^n.at n=14A258598