1412496

Appears in sequences

• Expansion of (1+2*x+x^2)/(1-34*x+x^2).at n=4A004294
• Numbers k such that 2*k^2 + 9 is a square.at n=8A075848
• Expansion of (1 +4*x -x^2)/((1-x^2)*(1-2*x-x^2)); a Pellian-related sequence.at n=15A114689
• a(n) = Pell(n)*A132973(n) for n>=1, with a(0)=1, where A132973 lists the coefficients in psi(-q)^3/psi(-q^3) and where psi() is a Ramanujan theta function.at n=16A209450
• Numbers c(n) whose square are equal to the sum of an odd number M of consecutive cubed integers b^3 + (b+1)^3 + ... + (b+M-1)^3 = c(n)^2, starting at b(n) (A253679).at n=7A253680