-2200

Appears in sequences

• Expansion of sin(tan(x))*x.at n=4A009508
• First differences of A014292.at n=23A104862
• G.f.: ((1-q)^2+(1+q)*sqrt(1-6*q+q^2))/2.at n=7A177010
• a(n) = 2n(19-n).at n=44A182428
• Triangle T(n,k), n>=0, 0<=k<=2n, read by rows: row n gives the coefficients of the chromatic polynomial of the complete bipartite graph K_(n,n), highest powers first.at n=28A212084
• Triangle T(n,k), n>=0, 0<=k<=n, read by rows: row n gives the coefficients of the chromatic polynomial of the (n,2)-Turán graph, highest powers first.at n=58A266972
• Triangle T(n, m) appearing in the expansion of Jacobi's elliptic function cn(u, k) divided by cos(v) in terms of the Jacobi nome q and even powers of 2*cos(v) with v = u/((2/Pi)*K(k)).at n=49A275791
• Expansion of (1 - x + x^2)/(1 - 2*x + 3*x^2 + 2*x^3 + x^4).at n=11A375275