46642

Appears in sequences

• Numbers k such that 10^k + 4*R_k + 3 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=23A102934
• G.f. A(x) satisfies: A(x)^3 = x * A( (A(x) + A(x)^2)^2 ).at n=7A273030