2804012domain: NAppears in sequencesa(n) = Sum_{k=0..7} binomial(n,k).at n=30A008860Numbers of vectors with 2*n integers such that each element is either 1 or -1, and their sum > n.at n=14A226197a(n) = Sum_{k=0..n} binomial(4*n+2,k).at n=7A387009