Triangle read by rows: T(0,0) = 1; T(n,k) = 2*T(n-1,k) - 2*T(n-2,k-1) + T(n-3,k-2) for k = 0..floor(2*n/3); T(n,k)=0 for n or k < 0.

A304213

Triangle read by rows: T(0,0) = 1; T(n,k) = 2*T(n-1,k) - 2*T(n-2,k-1) + T(n-3,k-2) for k = 0..floor(2*n/3); T(n,k)=0 for n or k < 0.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =-2a(4) =8a(5) =-8a(6) =1a(7) =16a(8) =-24a(9) =8a(10) =32a(11) =-64a(12) =36a(13) =-4a(14) =64a(15) =-160a(16) =128a(17) =-32a(18) =1a(19) =128a(20) =-384a(21) =400a(22) =-160a(23) =18a(24) =256a(25) =-896a(26) =1152a(27) =-640a(28) =136a(29) =-6

External references