Triangle read by rows: T(n,k) = t(n-k, k); t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1), where f(x) = 3*x + 5.

A257624

Triangle read by rows: T(n,k) = t(n-k, k); t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1), where f(x) = 3*x + 5.

Terms

    a(0) =1a(1) =5a(2) =5a(3) =25a(4) =80a(5) =25a(6) =125a(7) =915a(8) =915a(9) =125a(10) =625a(11) =9070a(12) =20130a(13) =9070a(14) =625a(15) =3125a(16) =83185a(17) =348410a(18) =348410a(19) =83185a(20) =3125a(21) =15625a(22) =727980a(23) =5246655a(24) =9755480a(25) =5246655a(26) =727980a(27) =15625a(28) =78125a(29) =6183215

External references