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

A318686

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

Terms

    a(0) =1a(1) =1a(2) =0a(3) =-2a(4) =1a(5) =1a(6) =0a(7) =-4a(8) =2a(9) =4a(10) =-4a(11) =1a(12) =1a(13) =0a(14) =-6a(15) =3a(16) =12a(17) =-12a(18) =-5a(19) =12a(20) =-6a(21) =1a(22) =1a(23) =0a(24) =-8a(25) =4a(26) =24a(27) =-24a(28) =-26a(29) =48

External references