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

A302747

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

Terms

    a(0) =1a(1) =-2a(2) =4a(3) =3a(4) =-8a(5) =-12a(6) =16a(7) =36a(8) =9a(9) =-32a(10) =-96a(11) =-54a(12) =64a(13) =240a(14) =216a(15) =27a(16) =-128a(17) =-576a(18) =-720a(19) =-216a(20) =256a(21) =1344a(22) =2160a(23) =1080a(24) =81a(25) =-512a(26) =-3072a(27) =-6048a(28) =-4320a(29) =-810

External references