Triangle read by rows: T(0,0) = 1; T(n,k) = T(n-1,k) + 6*T(n-2,k-1) for k = 0..floor(n/2); T(n,k)=0 for n or k < 0.
A304252
Triangle read by rows: T(0,0) = 1; T(n,k) = T(n-1,k) + 6*T(n-2,k-1) for k = 0..floor(n/2); T(n,k)=0 for n or k < 0.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =6a(4) =1a(5) =12a(6) =1a(7) =18a(8) =36a(9) =1a(10) =24a(11) =108a(12) =1a(13) =30a(14) =216a(15) =216a(16) =1a(17) =36a(18) =360a(19) =864a(20) =1a(21) =42a(22) =540a(23) =2160a(24) =1296a(25) =1a(26) =48a(27) =756a(28) =4320a(29) =6480
External references
- oeis: A304252