68717

Appears in sequences

• Indices of primes in sequence defined by A(0) = 39, A(n) = 10*A(n-1) - 1 for n > 0.at n=22A101847
• Expansion of g.f.: (1 + x^2 - x^3)/(1 - x - x^2 + x^3 - x^5).at n=31A147604