1786432

Appears in sequences

• G.f. A(x) satisfies: 1 = Sum_{n>=0} (-x)^n * A(x)^n * (1 - (-x)^(n+1))^(n+1).at n=14A351633
• a(0) = 1 and a(1) = 2, then each subsequent term is obtained by multiplying the two previous terms and then deleting repeated digits, keeping only the first occurrence of each digit.at n=28A392141