First subdiagonal of triangular array T: T(j,1) = 1 for ((j-1) mod 6) < 3, else 0; T(j,k) = T(j-1,k-1) + T(j-1,k) for 2 <= k <= j.

A131023

First subdiagonal of triangular array T: T(j,1) = 1 for ((j-1) mod 6) < 3, else 0; T(j,k) = T(j-1,k-1) + T(j-1,k) for 2 <= k <= j.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =7a(6) =14a(7) =37a(8) =101a(9) =256a(10) =593a(11) =1267a(12) =2534a(13) =4825a(14) =8921a(15) =16384a(16) =30581a(17) =58975a(18) =117950a(19) =242461a(20) =504605a(21) =1048576a(22) =2156201a(23) =4371451a(24) =8742902a(25) =17308657a(26) =34085873a(27) =67108864a(28) =132623405a(29) =263652487

External references