56819

Appears in sequences

• a(n) = floor(n*3^(n/2)).at n=14A128443
• Equals two maps: number of n X 4 binary arrays indicating the locations of corresponding elements equal to exactly two of their king-move neighbors in a random 0..2 n X 4 array.at n=3A220318
• T(n,k)=Equals two maps: number of nXk binary arrays indicating the locations of corresponding elements equal to exactly two of their king-move neighbors in a random 0..2 nXk array.at n=24A220319