2755601

Properties

Appears in sequences

• Primes p such that sigma(p-1)+sigma(p+1) is prime.at n=30A067464
• Expansion of 1/(x^k*(1-x-2*x^(k+1))) for k=4.at n=38A143447
• Primes of the form 81n^2 - 90n + 26.at n=19A144571
• Sophie Germain primes of A144571.at n=3A154505
• Coefficients in expansion of 1/(1 - x - 2*x^5).at n=42A318777
• Prime numbersat n=200364