81605

Appears in sequences

• Indices of primes in sequence defined by A(0) = 87, A(n) = 10*A(n-1) - 13 for n > 0.at n=6A101072
• E.g.f. A(x) satisfies: Sum_{n>=1} Moebius(n) * A(x)^n/n = x.at n=6A204290