116197

Appears in sequences

• Semiprimes in A103376.at n=25A103396
• a(1) = a(2) = 1, a(n) = A007947(a(n-1)) + a(n-2), for n >= 3, i.e., a(n) = a(n-2) plus the largest squarefree divisor of a(n-1).at n=30A121368