A triangle of coefficients based on A139360 as an n-like set of three binomials: f(x,y,n)=ChebyshevT[n, x]*ChebyshevT[n, y] + ChebyshevT[n, x] + ChebyshevT[n, y]; p(x,y,z,n)=f(x,y,n)+f(y,z,n)+f(z,x,n).

A139604

A triangle of coefficients based on A139360 as an n-like set of three binomials: f(x,y,n)=ChebyshevT[n, x]*ChebyshevT[n, y] + ChebyshevT[n, x] + ChebyshevT[n, y]; p(x,y,z,n)=f(x,y,n)+f(y,z,n)+f(z,x,n).

Terms

    a(0) =9a(1) =5a(2) =4a(3) =1a(4) =0a(5) =8a(6) =5a(7) =-12a(8) =0a(9) =16a(10) =9a(11) =0a(12) =-32a(13) =0a(14) =32a(15) =5a(16) =20a(17) =0a(18) =-80a(19) =0a(20) =64a(21) =1a(22) =0a(23) =72a(24) =0a(25) =-192a(26) =0a(27) =128a(28) =5a(29) =-28

External references