110421

Appears in sequences

• Coefficient of x in the reduction by x^2->x+1 of the polynomial p(n,x) defined below in Comments.at n=21A192761
• Number of (w,x,y,z) with all terms in {0,...,n} and at least one of these conditions holds: w<R, x>R, y>R, z>R, where R = max{w,x,y,z} - min{w,x,y,z}.at n=18A212754
• Matrix inverse of the triangle of Eulerian numbers T(n,k), 0<=k<=n, read by rows.at n=16A224228