24227
domain: N
Appears in sequences
- a(n) = a(n-1) + 2*a(n-3).at n=19A003476
- Triangle read by rows: T(n,k) is the number of hill-free Dyck paths of semilength n and having k valleys strictly above the x-axis (0<=k<=n-2; n>=2). A hill in a Dyck path is a peak at level 1.at n=59A119011
- A255279(2^n-1).at n=7A255280
- Numbers k such that 309*2^k+1 is prime.at n=30A323144