Triangle T(n, k) read by rows, n > 0 and 0 < k <= 3^(n-1): T(n, k) = A321768(n, k) * A321769(n, k) / 2.
A322170
Triangle T(n, k) read by rows, n > 0 and 0 < k <= 3^(n-1): T(n, k) = A321768(n, k) * A321769(n, k) / 2.
Terms
- a(0) =6a(1) =30a(2) =210a(3) =60a(4) =84a(5) =1320a(6) =630a(7) =1560a(8) =7140a(9) =1386a(10) =924a(11) =2340a(12) =210a(13) =180a(14) =4620a(15) =2730a(16) =10920a(17) =45144a(18) =7854a(19) =7980a(20) =23184a(21) =2574a(22) =5016a(23) =63336a(24) =26910a(25) =49476a(26) =242556a(27) =50490a(28) =25200a(29) =57420
External references
- oeis: A322170