19114420
domain: N
Appears in sequences
- Number of perfect matchings in graph P_{2} X P_{5} X P_{n}.at n=5A028449
- Number of n X n matrices containing a permutation of 1..n*n moving each element at most to a neighboring position.at n=5A181205
- T(n,k) = number of n X k matrices containing a permutation of 1..n*k moving each element at most to a neighboring position.at n=40A181206