70489

Properties

Appears in sequences

• a(1) = 1, a(2) = 2 and a(n) = smallest number not included earlier that divides the concatenation a(n-2), a(n-1).at n=38A085946
• Primes from merging of 5 successive digits in decimal expansion of Catalan's constant.at n=25A104919
• Primes that become squares when prefixed with an 8.at n=8A167741
• Primes of the form q(p) + 1, where p is a prime and q(.) is the strict partition function (A000009).at n=8A234366
• Primes of the form n^2-n-1 (for some n) such that p^2-p-1 is also prime.at n=25A237642
• Prime numbers p such that p - primepi(p) is a square, where primepi is the prime counting function.at n=31A245061
• Centered 18-gonal (or octadecagonal) primes.at n=33A264825
• Denominators of upper primes-only best approximates (POBAs) to sqrt(8); see Comments.at n=17A265793
• Denominators of primes-only best approximates (POBAs) to sqrt(8); see Comments.at n=14A265795
• Primes of the form prime(n+2)*prime(n+1) - prime(n) +- 1.at n=35A294625
• Number of parts in all partitions of n with largest multiplicity five.at n=37A320375
• Prime numbersat n=6985