Triangle T(n, k) read by rows; given by [1, 1, 1, 1, 1, ...] DELTA [1, 1, 2, 5, 14, 42, 132, 429, 1430, ...] (A000108) where DELTA is Deléham's operator defined in A084938.
A085843
Triangle T(n, k) read by rows; given by [1, 1, 1, 1, 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) =1a(2) =1a(3) =2a(4) =4a(5) =2a(6) =5a(7) =16a(8) =17a(9) =6a(10) =14a(11) =67a(12) =122a(13) =99a(14) =30a(15) =42a(16) =294a(17) =891a(18) =1406a(19) =1105a(20) =338a(21) =132a(22) =1346a(23) =7072a(24) =22789a(25) =40868a(26) =35719a(27) =11782a(28) =429a(29) =6397
External references
- oeis: A085843