168660

Appears in sequences

• Numbers k such that k*3^k - 1 is prime.at n=20A006553
• Sequence (a(n): n >= 1) that shifts left 2 places under the "CHK" (necklace, identity, unlabeled) transform and has initial terms a(1) = a(2) = 1.at n=19A032173
• a(n) = 108*n^2 - 104*n + 20 (n>=1).at n=39A304835