Triangle T(n,k) with the coefficient of [x^k] of the polynomial (2*(x+1)^2)^n in row n, column k, 0<=k<=2n.
A139548
Triangle T(n,k) with the coefficient of [x^k] of the polynomial (2*(x+1)^2)^n in row n, column k, 0<=k<=2n.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =2a(4) =4a(5) =16a(6) =24a(7) =16a(8) =4a(9) =8a(10) =48a(11) =120a(12) =160a(13) =120a(14) =48a(15) =8a(16) =16a(17) =128a(18) =448a(19) =896a(20) =1120a(21) =896a(22) =448a(23) =128a(24) =16a(25) =32a(26) =320a(27) =1440a(28) =3840a(29) =6720
External references
- oeis: A139548