Triangle T(n,k), read by rows, defined by T(n,k)=3*T(n-1,k)-T(n-1,k-1)-T(n-2,k), T(0,0)=1, T(1,0)=2, T(1,1)=-1, T(n,k)=0 if k<0 or if k>n.
A123971
Triangle T(n,k), read by rows, defined by T(n,k)=3*T(n-1,k)-T(n-1,k-1)-T(n-2,k), T(0,0)=1, T(1,0)=2, T(1,1)=-1, T(n,k)=0 if k<0 or if k>n.
Terms
- a(0) =1a(1) =2a(2) =-1a(3) =5a(4) =-5a(5) =1a(6) =13a(7) =-19a(8) =8a(9) =-1a(10) =34a(11) =-65a(12) =42a(13) =-11a(14) =1a(15) =89a(16) =-210a(17) =183a(18) =-74a(19) =14a(20) =-1a(21) =233a(22) =-654a(23) =717a(24) =-394a(25) =115a(26) =-17a(27) =1a(28) =610a(29) =-1985
External references
- oeis: A123971