77511

Appears in sequences

• Numbers k such that 13*2^k - 1 is prime.at n=16A001773
• Generalized Catalan numbers: a(n+1) = a(n) + Sum_{k=2..n-1} a(k)*a(n-1-k).at n=18A004149
• Triangle of T(n,k)=number of peakless Motzkin paths of length n containing k valleys (can be easily expressed using RNA secondary structure terminology).at n=43A089738