Triangle read by rows: T(n,k) = a(k)*binomial(n,k) (0 <= k <= n), where a(0)=1, a(1)=2, a(k) = a(k-1) + 3*a(k-2) for k >= 2 (a(k) = A006138(k)).

A124959

Triangle read by rows: T(n,k) = a(k)*binomial(n,k) (0 <= k <= n), where a(0)=1, a(1)=2, a(k) = a(k-1) + 3*a(k-2) for k >= 2 (a(k) = A006138(k)).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =1a(4) =4a(5) =5a(6) =1a(7) =6a(8) =15a(9) =11a(10) =1a(11) =8a(12) =30a(13) =44a(14) =26a(15) =1a(16) =10a(17) =50a(18) =110a(19) =130a(20) =59a(21) =1a(22) =12a(23) =75a(24) =220a(25) =390a(26) =354a(27) =137a(28) =1a(29) =14

External references