25496

Appears in sequences

• a(n) = a(n-1) + a(n-2) + a(n-3) + a(n-4).at n=16A145028
• 1/3 the number of nX3 0..2 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=4A185553
• 1/3 the number of nX5 0..2 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=2A185555
• T(n,k)=1/3 the number of nXk 0..2 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=23A185559
• T(n,k)=1/3 the number of nXk 0..2 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.at n=25A185559
• Number of 4 X n 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 1 1 vertically.at n=8A207684
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 793", based on the 5-celled von Neumann neighborhood.at n=29A273566