155117519

Properties

Appears in sequences

• Central binomial coefficient - 1.at n=30A014495
• Number of combinations of n things from 1 to n at a time, with repeats allowed.at n=14A030662
• Number of 2n-bead balanced binary necklaces of fundamental period 2n equivalent to reverse.at n=31A045680
• Primes of the form (2*n)!/(n!)^2 - 1.at n=4A092751
• Primes within +1 or -1 of a central binomial coefficient C(2n,n).at n=10A117315
• Swinging primes: primes which are within 1 of a swinging factorial (A056040).at n=17A163074
• Primes of the form k$ - 1. Here '$' denotes the swinging factorial function (A056040).at n=8A163076
• a(n) = greatest prime < binomial(2n, n).at n=13A359293
• Prime numbersat n=8715812