28712

Appears in sequences

• Indices of primes which remain prime if any one digit is deleted (leading zeros allowed).at n=47A084375
• Difference between the product of two consecutive primes and the next prime.at n=38A111071
• Expansion of x/((1 - x - x^4)*(1 - x)^4).at n=19A145133
• Number of length n+5 0..1 arrays with at most two downsteps in every 5 consecutive neighbor pairs.at n=9A256813
• Number of length n+2 0..1 arrays with at most two downsteps in every n consecutive neighbor pairs.at n=18A256817
• G.f.: 1/(1 - x/(1+2*x - x^3/(1+2*x^2 - x^5/(1+2*x^3 - x^7/(1+2*x^4 - x^9/(1 - ...)))))), a continued fraction.at n=73A275761
• Total number of graceful labelings of the n-pan graph.at n=9A333729