2213120

Appears in sequences

• E.g.f. C(x,y) = 1 + Integral S(x,y)*C(y,x) dx such that C(x,y)^2 - S(x,y)^2 = 1 and C(y,x) = Integral S(y,x)*C(x,y) dy, where C(x,y) = Sum_{n>=0} Sum_{k=0..n} T(n,k) * x^(2*n-2*k)*y^(2*k)/((2*n-2*k)!*(2*k)!), as a triangle of coefficients T(n,k) read by rows.at n=31A322221
• E.g.f. C(y,x) = 1 + Integral S(y,x)*C(x,y) dy such that C(y,x)^2 - S(y,x)^2 = 1 and C(x,y) = Integral S(x,y)*C(y,x) dx, where C(y,x) = Sum_{n>=0} Sum_{k=0..n} T(n,k) * x^(2*n-2*k)*y^(2*k)/((2*n-2*k)!*(2*k)!), as a triangle of coefficients T(n,k) read by rows.at n=32A322222
• E.g.f. G(x,y) = Integral C(x,y)*S(y,x) dx such that C(x,y)^2 + S(x,y)^2 = 1 and S(y,x) = Integral C(x,y)*C(y,x) dy, as a triangle of coefficients T(n,k) read by rows.at n=24A367382