50117

Appears in sequences

• Strong pseudoprimes to base 61.at n=15A020287
• a(n+1) = a(n) + n (if n is even), a(n+1) = a(n) * n (if n is odd).at n=12A047905
• Structured octagonal anti-diamond numbers (vertex structure 7).at n=22A100187
• a(n) = (3 + 2*n + 6*n^2 + 4*n^3)/3.at n=33A166464
• Semiprimes p such that next semiprime after p is p+20.at n=14A217335
• G.f. A(x,y) satisfies: A(x,y) = x + A( x^2 + x*y*A(x,y)^2, y).at n=68A271868