A(n,k) = Sum_{j=0..n} (k*n)!/(j! * (n-j)!)^k, square array A(n,k) read by antidiagonals, for n >= 0, k >= 0.
A306641
A(n,k) = Sum_{j=0..n} (k*n)!/(j! * (n-j)!)^k, square array A(n,k) read by antidiagonals, for n >= 0, k >= 0.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =1a(4) =2a(5) =3a(6) =1a(7) =4a(8) =4a(9) =4a(10) =1a(11) =12a(12) =36a(13) =8a(14) =5a(15) =1a(16) =48a(17) =900a(18) =400a(19) =16a(20) =6a(21) =1a(22) =240a(23) =45360a(24) =94080a(25) =4900a(26) =32a(27) =7a(28) =1a(29) =1440
External references
- oeis: A306641