188355

Appears in sequences

• Numbers k such that k+1 and sigma(k)+1 are both perfect squares.at n=29A089954
• a(n) = 3abc, where (a,b,c) is a Markoff triple. The first Markoff triple considered is (1,2,5) and the ordering is increasing.at n=8A120339
• a(n) = (2*n+1)*(n+1)*(2*n^2+3*n-1).at n=14A123197
• Composite squarefree numbers n such that p(i)+3 divides n-3, where p(i) are the prime factors of n.at n=14A225713