-1435039

Appears in sequences

• Expansion of 1/(1 - x + 4*x^2).at n=21A106853
• a(n) = 2^(2n-1) sin(nA)/sqrt(15), where A is the angle opposite side BC in a triangle ABC having sidelengths |BC|=2, |CA| = 3, |AB| = 4; ABC is the smallest integer-sided scalene triangle.at n=11A375883