104268

Appears in sequences

• Number of 4-step king-knight's tours (piece capable of both kinds of moves) on an n X n board summed over all starting positions.at n=7A187852
• Number of -4..4 arrays x(0..n-1) of n elements with zeroth through n-1st differences all nonzero.at n=5A199939
• T(n,k)=Number of -k..k arrays x(0..n-1) of n elements with zeroth through n-1st differences all nonzero.at n=41A199943
• Number of -n..n arrays x(0..5) of 6 elements with zeroth through 5th differences all nonzero.at n=3A199947
• Let K be a local ring with a principal maximal ideal J of nilpotent degree 3 with |K/J|>2; a(n) = number of D-invariant ideals in the ring R_n(K,J).at n=6A221703
• a(n) = 16*(n-1)*a(n-1) + ((-1)^n)*(4/3)*Product_{k=0..n-1} (2*k-3) with a(0) = 0.at n=4A302115