8977824540

Appears in sequences

• 1/4 the number of n X 3 0..3 arrays with no element equal both to the element above and to the element to its left.at n=5A185561
• 1/4 the number of nX6 0..3 arrays with no element equal both to the element above and to the element to its left.at n=2A185564
• T(n,k)=1/4 the number of nXk 0..3 arrays with no element equal both to the element above and to the element to its left.at n=30A185567