Row sums 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.
A131024
Row sums 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) =3a(2) =7a(3) =11a(4) =16a(5) =22a(6) =36a(7) =73a(8) =175a(9) =431a(10) =1024a(11) =2290a(12) =4824a(13) =9649a(14) =18571a(15) =34955a(16) =65536a(17) =124510a(18) =242460a(19) =484921a(20) =989527a(21) =2038103a(22) =4194304a(23) =8565754a(24) =17308656a(25) =34617313a(26) =68703187a(27) =135812051a(28) =268435456a(29) =532087942
External references
- oeis: A131024