207470

Appears in sequences

• 1/12 the number of (n+2)X(n+2) 0..2 arrays with each 3X3 subblock containing three of each value.at n=4A184377
• 1/12 the number of (n+2)X7 0..2 arrays with each 3X3 subblock containing three of each value.at n=4A184382