-6016

Appears in sequences

• Expansion of 1/(1+2*x-2*x^3).at n=19A077988
• Expansion of 1/(1+2*x-2*x^3).at n=21A077988
• Expansion of (1-x)/(1+x+2*x^2+x^3).at n=30A078051
• Expansion of g.f. (1+x^2)/(1+x-x^3).at n=60A104770
• Expansion of (1+x)/(1+2x-2x^3).at n=22A124342
• a(0)=0, a(1)=1, a(2)=2 and a(n) = a(n-1) - 2a(n-2) + a(n-3).at n=31A166117
• A triangle of coefficients based on the squares of the Chebyshev T and U polynomials: p(x,n)=If[Mod[n, 2] == 0, (ChebyshevT[n + 1, x]^2 + x^2*ChebyshevU[n, x]^2)/(2*x^2), (-1 + ChebyshevT[n + 1, x]^2 + x^2*ChebyshevU[n, x]^2)/(2*x^2)].at n=53A173335
• Expansion of (1/q) * phi(-q) * phi(q^4) / (phi(q) * psi(q^8)) in powers of q where phi(), psi() are Ramanujan theta functions.at n=15A215346
• Expansion of q^(-1) * phi(q^2)^2 / (phi(q) * psi(q^8)) in powers of q where phi(), psi() are Ramanujan theta functions.at n=15A232392
• Imaginary parts of the recursive sequence a(n+2) = Sum_{k=0..n} binomial(n,k)*a(k)*a(n+1-k), with a(0)=2, a(1)=i.at n=8A289085