437346

Appears in sequences

• Constant term of the reduction by x^2 -> x+1 of the polynomial p(n,x) defined below in Comments.at n=16A192426
• Triangular array read by rows. T(n,k) is the number of inequivalent (as defined below) transitive binary relations R on [n] such that |domain(R intersect R^(-1))| = k, n>=0, 0<=k<=n.at n=33A369776