28707

Appears in sequences

• Number of subsequences of {1..n} such that all differences of pairs of terms are distinct (i.e., number of Golomb rulers on {1..n}).at n=24A054578
• Numbers k such that k^6 - 2 and k^6 + 2 are both primes.at n=36A154938
• Number of length n left factors of Dyck paths having no triple-rises (triple-rise = three consecutive (1,1)-steps).at n=23A191786
• Expansion of Product_{k>=1} (1 + x^(5*k-4))^(5*k-4).at n=51A285338
• Array read by antidiagonals: T(n,k) is the number of rooted strong triangulations of a disk with n interior nodes and 3+k nodes on the boundary.at n=50A341856