Triangle read by rows: T(0,0) = 1; T(n,k) = 2 T(n-1,k) - 3 T(n-1,k-1) + T(n-1,k-2) for k = 0..2n; T(n,k)=0 for n or k < 0.
A318685
Triangle read by rows: T(0,0) = 1; T(n,k) = 2 T(n-1,k) - 3 T(n-1,k-1) + T(n-1,k-2) for k = 0..2n; T(n,k)=0 for n or k < 0.
Terms
- a(0) =1a(1) =2a(2) =-3a(3) =1a(4) =4a(5) =-12a(6) =13a(7) =-6a(8) =1a(9) =8a(10) =-36a(11) =66a(12) =-63a(13) =33a(14) =-9a(15) =1a(16) =16a(17) =-96a(18) =248a(19) =-360a(20) =321a(21) =-180a(22) =62a(23) =-12a(24) =1a(25) =32a(26) =-240a(27) =800a(28) =-1560a(29) =1970
External references
- oeis: A318685