-2082

Appears in sequences

• Binomial centered tridigonal matrices as a triangular sequence: t(n,m.d)=If[n + m - 1 == d, binomial[d - 1, n - 1], If[n + m == d, -1, If[n + m - 2 == d, -1, 0]]].at n=24A124030
• Coefficient of y^0 in G(x,y)^3 where G(x,y) = Sum_{n=-oo..+oo} (1-x^n)^n * x^n * y^n.at n=35A263188
• Expansion of 1 / (1 + Sum_{k>=1} mu(k)^2 * x^k).at n=39A329099
• a(n) = Sum_{k=1..n} (-2)^(floor(n/k) - 1).at n=11A345034