73977

Appears in sequences

• a(1) = 1; thereafter a(n) = a(n-1) + d_1^1 + d_2^2 + d_3^3 + ..., where d_1 d_2 d_3 ... is the decimal expansion of a(n-1).at n=22A263535
• First appearance of 2^n in A281130.at n=16A281131