Triangle read by rows: T(0,0)=1; T(n,k) = 2*T(n-1,k)-2*T(n-1,k-1)+T(n-1,k-2), for k = 0, 1, ..., 2*n; T(n,k)=0 for n or k < 0.

A304209

Triangle read by rows: T(0,0)=1; T(n,k) = 2*T(n-1,k)-2*T(n-1,k-1)+T(n-1,k-2), for k = 0, 1, ..., 2*n; T(n,k)=0 for n or k < 0.

Terms

    a(0) =1a(1) =2a(2) =-2a(3) =1a(4) =4a(5) =-8a(6) =8a(7) =-4a(8) =1a(9) =8a(10) =-24a(11) =36a(12) =-32a(13) =18a(14) =-6a(15) =1a(16) =16a(17) =-64a(18) =128a(19) =-160a(20) =136a(21) =-80a(22) =32a(23) =-8a(24) =1a(25) =32a(26) =-160a(27) =400a(28) =-640a(29) =720

External references