40170

Appears in sequences

• Squarefree kernel of (n*prime(n))*(n+prime(n)).at n=26A066197
• Number of (n+2) X 9 0..3 arrays with every 3 X 3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly three ways, and new values 0..3 introduced in row major order.at n=7A204641
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 411", based on the 5-celled von Neumann neighborhood.at n=38A271891
• Composite squarefree integers for which the sum of the squares of their factors is a square.at n=26A379780