61700

Appears in sequences

• Sum of Gaussian binomial coefficients for q=15.at n=4A015203
• Numbers k such that 223*2^k+1 is prime.at n=32A032488
• Triangle read by rows: T(n,k) = number of peakless Motzkin paths of length n having k (1,1) steps starting at level zero (can be easily expressed also in RNA secondary structure terminology).at n=59A089736
• a(n) = A289670(n)/2^f(n), where f(n) = 2*floor((n-1)/3) + ((n+2) mod 3).at n=51A289676
• a(n) = A289676(3*n+1).at n=17A290436
• a(n) = A324543(2*A000040(n)).at n=19A324549