Triangle T(n, k) read by rows; given by [0, 1, 0, 1, 0, 1, ...] DELTA [1, 1, 2, 5, 14, 42, 132, 429, 1430, ...] (A000108) where DELTA is Deléham's operator defined in A084938.
A085845
Triangle T(n, k) read by rows; given by [0, 1, 0, 1, 0, 1, ...] DELTA [1, 1, 2, 5, 14, 42, 132, 429, 1430, ...] (A000108) where DELTA is Deléham's operator defined in A084938.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =2a(6) =0a(7) =1a(8) =6a(9) =6a(10) =0a(11) =1a(12) =12a(13) =40a(14) =30a(15) =0a(16) =1a(17) =20a(18) =156a(19) =474a(20) =338a(21) =0a(22) =1a(23) =30a(24) =440a(25) =4222a(26) =15592a(27) =11782a(28) =0a(29) =1
External references
- oeis: A085845