219311

Properties

Appears in sequences

• Primes of the form 7n^2 + 8.at n=8A201608
• Prime p such that p and p+2 are twin primes and p^2+p-1 p^2+p+1 are also twin primes.at n=36A228968
• Number of connected squarefree bipartite graphs on n vertices.at n=15A300749
• Expansion of g.f. A(x) satisfying Sum_{n=-oo..+oo} (-1)^n * (x^n + 7*A(x))^n = 1 + 9*Sum_{n>=1} (-1)^n * x^(n^2).at n=6A370027
• Prime numbersat n=19552