5147732449

Appears in sequences

• a(1)=1, a(n) = n*18^(n-1) + a(n-1).at n=7A014935
• a(n) = 1 + 2*n + 3*n^2 + 4*n^3 + 5*n^4 + 6*n^5 + 7*n^6 + 8*n^7.at n=18A113618