49939

Properties

Appears in sequences

• Fibonacci sequence beginning 7, 15.at n=18A022389
• Number of n-bead necklace structures using exactly two different colored beads.at n=20A056295
• Number of different sets of n-gons labeled 1...n such that all members of each set contain equivalent paths with increasing labels; i.e., the number of isotemporal classes of n-gons.at n=18A092481
• Smallest odd prime p such that n=(p-1)/ord_p(3).at n=28A101209
• Primes of the form Sum_{k=1..n} phi(prime(k)).at n=23A101302
• Lesser prime factor of successively better golden semiprimes.at n=16A165571
• Primes having only {3, 4, 9} as digits.at n=47A199349
• Number of n-bead necklaces of 3 colors allowing reversal, with no adjacent beads having the same color.at n=20A208539
• Expansion of F(x) where F(x) = 1 + x / (1 - x * F(x^2)^2 ).at n=19A238431
• Denominators of upper primes-only best approximates (POBAs) to sqrt(5); see Comments.at n=13A265787
• Denominators of primes-only best approximates (POBAs) to sqrt(5); see Comments.at n=10A265789
• Denominators of upper primes-only best approximates (POBAs) to the golden ratio, phi (A001622); see Comments.at n=17A265799
• Denominators of primes-only best approximates (POBAs) to the golden ratio, phi; see Comments.at n=17A265801
• Numerators of primes-only best approximates (POBAs) to 1/(golden ratio) = 1/phi; see Comments.at n=16A265806
• Triangle read by rows, 1 <= k <= n: T(n,k) = non-isomorphic colorings of a toroidal n X k grid using exactly two colors under translational symmetry and swappable colors.at n=23A294791
• Number of n-bead bracelets using exactly three colors with no adjacent beads having the same color.at n=20A330632
• Prime numbersat n=5128