Triangle T(n,k) = n!/(n-k)! (0 <= k <= n) read by rows, giving number of permutations of n things k at a time.
A008279
Triangle T(n,k) = n!/(n-k)! (0 <= k <= n) read by rows, giving number of permutations of n things k at a time.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =2a(6) =1a(7) =3a(8) =6a(9) =6a(10) =1a(11) =4a(12) =12a(13) =24a(14) =24a(15) =1a(16) =5a(17) =20a(18) =60a(19) =120a(20) =120a(21) =1a(22) =6a(23) =30a(24) =120a(25) =360a(26) =720a(27) =720a(28) =1a(29) =7
External references
- oeis: A008279