Triangle read by rows, T(n, k) = [x^k] ((2*x^3 - 3*x^2 - x + 1)/(1 - x)^(n + 2)), for n >= 1 and 0 <= k < n.
A350584
Triangle read by rows, T(n, k) = [x^k] ((2*x^3 - 3*x^2 - x + 1)/(1 - x)^(n + 2)), for n >= 1 and 0 <= k < n.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =1a(4) =4a(5) =7a(6) =1a(7) =5a(8) =12a(9) =19a(10) =1a(11) =6a(12) =18a(13) =37a(14) =56a(15) =1a(16) =7a(17) =25a(18) =62a(19) =118a(20) =174a(21) =1a(22) =8a(23) =33a(24) =95a(25) =213a(26) =387a(27) =561a(28) =1a(29) =9
External references
- oeis: A350584