Triangle T(n,k), 0<=k<=n, given by (0,2,0,4,0,6,0,8,0,10,0,...) DELTA (1, 2, 3, 4, 5, 6, 7, 8, 9,...) where DELTA is the operator defined in A084938.
A211402
Triangle T(n,k), 0<=k<=n, given by (0,2,0,4,0,6,0,8,0,10,0,...) DELTA (1, 2, 3, 4, 5, 6, 7, 8, 9,...) where DELTA is the operator defined in A084938.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =2a(5) =3a(6) =0a(7) =4a(8) =18a(9) =15a(10) =0a(11) =8a(12) =84a(13) =180a(14) =105a(15) =0a(16) =16a(17) =360a(18) =1500a(19) =2100a(20) =945a(21) =0a(22) =32a(23) =1488a(24) =10800a(25) =27300a(26) =28350a(27) =10395a(28) =0a(29) =64
External references
- oeis: A211402