-2664

Appears in sequences

• Expansion of (1-3x)/(1-x^2+x^3).at n=27A117374
• 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=56A136247
• a(n) = (4^n+8*(-5)^n)/9.at n=5A166036
• Expansion of phi(q^9) / phi(q) in powers of q where phi() is a Ramanujan theta function.at n=17A261988
• Coefficients in the expansion of 1/([r] + [2r]x + [3r]x^2 + ...); [ ] = floor, r = sqrt(e).at n=13A279595
• Expansion of ((eta(q)eta(q^3))/eta(q^2)^2)^2 in powers of q.at n=17A293389
• (Sum_{t=0..oo} ((-1)^t*(2*t+1)*q^((2*t+1)^2)))^3 * (Sum_{t=0..oo} q^((2*t+1)^2)) = Sum_{k=0..oo} a(k)*q^(8*k+4).at n=41A322031