A009545

Sequences linked to this entry ?

• A095704: Triangle read by rows giving coefficients of the trigonometric expansion of sin(n*x). match row sums
  1 · 2 · 3, 0, -1 · 4, 0, -4 … Σ 1, 2, 2, 0, -4, -8, -8, 0, …
  (−∞, ∞)