-654751

Appears in sequences

• Expansion of (1-4x^2)/(1+3x+4x^2).at n=20A128415
• Expansion of (2 + x + x^2 + x^3 - x^4 - 2*x^5 - 4*x^6 - 8*x^7) / (1 - x^4 + 16*x^8) in powers of x.at n=40A247487
• a(n) = 3*a(n-1) - 4*a(n-2) with a(0) = 2, a(1) = 3.at n=20A247563
• a(n) = 3*a(n-2) - 4*a(n-4) with a(0) = 2, a(1) = 1, a(2) = 3, a(3) = 1.at n=40A247564