703703domain: NAppears in sequences(x,y) = (a(n),a(n+1)) are the solutions of (t(x)+t(y))/(1+xy) = t(3) = 6, where t(n) denotes the n-th triangular number t(n) = n(n+1)/2.at n=5A065929Numbers k dividing every cyclic permutation of k^3.at n=45A242680