9049169

Appears in sequences

• Number of perfect matchings in graph P_{2} X P_{4} X P_{n}.at n=6A028448
• Number of perfect matchings in graph P_{2} X P_{6} X P_{n}.at n=4A028450
• 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=39A181206
• 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=41A181206