Another version of triangular array in A036970: triangle T(n,k), 0<=k<=n, read by rows; given by [0, 1, 2, 4, 6, 9, 12, 16, 20, 25, 30, ...] DELTA [1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, ...] where DELTA is the operator defined in A084938.
A094346
Another version of triangular array in A036970: triangle T(n,k), 0<=k<=n, read by rows; given by [0, 1, 2, 4, 6, 9, 12, 16, 20, 25, 30, ...] DELTA [1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, ...] where DELTA is the operator defined in A084938.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =2a(6) =0a(7) =3a(8) =8a(9) =6a(10) =0a(11) =17a(12) =54a(13) =60a(14) =24a(15) =0a(16) =155a(17) =556a(18) =762a(19) =480a(20) =120a(21) =0a(22) =2073a(23) =8146a(24) =12840a(25) =10248a(26) =4200a(27) =720a(28) =0a(29) =38227
External references
- oeis: A094346