999900

Appears in sequences

• a(n) = (4*n-1)*4*n*(4*n+1).at n=25A069140
• a(n) = n^6 - n^2.at n=10A136008
• A sum over partitions (q=10), see first comment.at n=6A221579
• a(n) = 3*n*(3*n + 1)*(3*n + 2).at n=32A228889
• Numbers m such that the largest digit in the decimal expansion of 1/m is 1.at n=37A333402