Coefficients T(n,k) of x^(3*n+1)*r^(3*k)/(3*n+1)! in power series S(x,r) = Integral C(x,r)^2 * D(x,r)^2 dx such that C(x,r)^3 - S(x,r)^3 = 1 and D(x,r)^3 - r^3*S(x,r)^3 = 1, as a symmetric triangle read by rows.
A357540
Coefficients T(n,k) of x^(3*n+1)*r^(3*k)/(3*n+1)! in power series S(x,r) = Integral C(x,r)^2 * D(x,r)^2 dx such that C(x,r)^3 - S(x,r)^3 = 1 and D(x,r)^3 - r^3*S(x,r)^3 = 1, as a symmetric triangle read by rows.
Terms
- a(0) =1a(1) =4a(2) =4a(3) =160a(4) =800a(5) =160a(6) =20800a(7) =292800a(8) =292800a(9) =20800a(10) =6476800a(11) =191910400a(12) =500121600a(13) =191910400a(14) =6476800a(15) =3946624000a(16) =210590336000a(19) =210590336000a(20) =3946624000
External references
- oeis: A357540