171120

Appears in sequences

• Order of the following permutation on 3n+1 symbols. Write the 3n+1 symbols horizontally into a 3-column grid and read them off vertically, i.e., column after column.at n=34A119980
• a(n) = 12*n^3 + 9*n^2 + 2*n.at n=24A191745