-10321920

Appears in sequences

• A triangular sequence from coefficients of an expansion of the Poisson's kernel: p(t,r)=(1-r^2)/(1-2*r*Cos(t)+r^2): r->t;Cos(t)->x.at n=44A137511
• Triangular sequence of coefficients from the expansion of p(x,t)=Tan(x*t)/Tan(t).at n=23A137660
• Irregular triangle T(n,k) read by rows of the reduced coefficients of Pi^(2*k) in the expansion of Sum_{k>=1} (1 / (4*k^2-1)^n).at n=19A382782