4823581

Appears in sequences

• a(1)=1, a(n) = n*15^(n-1) + a(n-1).at n=5A014930
• a(n) = 1 + 2*n + 3*n^2 + 4*n^3 + 5*n^4 + 6*n^5.at n=15A113531