57148

Appears in sequences

• Numbers k such that 13*4^k + 1 is prime.at n=15A002257
• a(n) = Sum_{d|n, n/d=1 mod 4} d^3 - Sum_{d|n, n/d=3 mod 4} d^3.at n=38A050471
• Number of unlabeled 2-ary cacti having n polygons. Also number of bicolored plane trees with n edges.at n=13A054357
• Difference between successive primes cubed: a(n) = prime(n+1)^3 - prime(n)^3.at n=18A129701
• A145312(n)/1440.at n=11A145346
• G.f.: 1/(1 + x + 5*x^2 - x^3 + x^4).at n=14A199805
• Practical numbers q with q + 2 and q^2 + 2 both practical.at n=27A294225