39165

Appears in sequences

• Odd numbers with exactly 4 distinct palindromic prime factors.at n=17A046406
• Numbers n such that (10^(2n+1)+54*10^n-1)/9 is prime.at n=6A107127
• a(n) = a(n-1) + a(n-2) + 2 a([n/2]), where a(0) = 1, a(1) = 2, a(2) = 3.at n=18A298347