69247

Properties

Appears in sequences

• Poincaré series [or Poincare series] for depths of roots in a certain root system.at n=23A019528
• Fibonacci sequence beginning 2 9.at n=20A022114
• Number of (s,2) gates.at n=15A037294
• Greater prime factor of successively better golden semiprimes.at n=15A165572
• Numbers n such that (7^n - 4^n)/3 is prime.at n=8A213073
• Numbers k such that 3^k - 8 is prime.at n=25A217135
• Denominators of upper primes-only best approximates (POBAs) to sqrt(5); see Comments.at n=14A265787
• Denominators of primes-only best approximates (POBAs) to sqrt(5); see Comments.at n=12A265789
• Numerators of lower primes-only best approximates (POBAs) to the golden ratio, phi (A001622); see Comments.at n=12A265796
• Numerators of primes-only best approximates (POBAs) to the golden ratio, phi; see Comments.at n=16A265800
• Denominators of primes-only best approximates (POBAs) to 1/(golden ratio) = 1/phi; see Comments.at n=15A265807
• Numbers k such that k!4 + 2^2 is prime, where k!4 = k!!!! is the quadruple factorial number (A007662).at n=40A291122
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1)*b(n), where a(0) = 1, a(1) = 3, b(0) = 2, b(1) = 4, b(2) = 5, and (a(n)) and (b(n)) are increasing complementary sequences.at n=16A296273
• Prime numbersat n=6877