205421

Properties

Appears in sequences

• Concatenation of (3n-2), (3n-1) and 3n divided by 3.at n=20A082252
• Initial primes of 5 consecutive primes with consecutive gaps 2, 4, 6, 8.at n=23A190814
• Prime numbers p such that x^2 + x + p produces primes for x = 0..4 but not x = 5.at n=28A210363
• Primes generated by concatenation of three consecutive numbers divided by three.at n=6A226041
• Number of sets of nonempty sets whose multiset union is a strongly normal multiset of size n.at n=9A318402
• Prime numbersat n=18416