-1864

Appears in sequences

• Expansion of (1-x)^(-1)/(1+2*x^2+x^3).at n=21A077894
• Triangle T(n,k) read by rows: coefficient [x^k] of the polynomial h(n,x) with h(0,x)=1, h(1,x)=1-x and recursively h(n,x) = 1 + n -(1-x)*(1-h(n-1,x)) - n*h(n-2,x).at n=47A136247
• INVERT transform of A002321, Mertens's function.at n=18A144031
• a(0)=1, a(1)=4, a(n) = 12*a(n-2) - a(n-1).at n=8A165458
• Number of twos minus number of ones in the first 2^n entries of the Kolakoski sequence, A000002.at n=27A289323
• Triangle read by rows, T(n, k) the coefficients of some polynomials in Pi, for n >= 0 and 0 <= k <= n.at n=17A295517
• Irregular triangular array read by rows: row n shows the coefficients of this polynomial of degree n: (1/n!)*(numerator of n-th derivative of (1-x)/(x^2-3x+1)).at n=36A328646
• Expansion of 1 / Sum_{k>=0} x^(k*(3*k - 2)).at n=51A363275