Triangle T(n, k) read by rows; given by [0, 1, 0, 2, 0, 3, 0, 4, ...] DELTA [1, 0, 2, 0, 2, 0, 3, 0, 2, 0, 4, 0, 2, 0, ...] (A000005 interspersed with 0's) where DELTA is Deléham's operator defined in A084938.
A085852
Triangle T(n, k) read by rows; given by [0, 1, 0, 2, 0, 3, 0, 4, ...] DELTA [1, 0, 2, 0, 2, 0, 3, 0, 2, 0, 4, 0, 2, 0, ...] (A000005 interspersed with 0's) where DELTA is Deléham's operator defined in A084938.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =1a(6) =0a(7) =1a(8) =4a(9) =1a(10) =0a(11) =1a(12) =11a(13) =11a(14) =1a(15) =0a(16) =1a(17) =26a(18) =62a(19) =26a(20) =1a(21) =0a(22) =1a(23) =57a(24) =266a(25) =258a(26) =57a(27) =1a(28) =0a(29) =1
External references
- oeis: A085852