Main diagonal 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,k-1) for 2 <= k <= j.
A129339
Main diagonal 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,k-1) for 2 <= k <= j.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =7a(4) =11a(5) =16a(6) =23a(7) =37a(8) =74a(9) =175a(10) =431a(11) =1024a(12) =2291a(13) =4825a(14) =9650a(15) =18571a(16) =34955a(17) =65536a(18) =124511a(19) =242461a(20) =484922a(21) =989527a(22) =2038103a(23) =4194304a(24) =8565755a(25) =17308657a(26) =34617314a(27) =68703187a(28) =135812051a(29) =268435456
External references
- oeis: A129339