784626domain: NAppears in sequencesa(n) = 2^n - C(n,0) - C(n,1) - ... - C(n,8).at n=20A035041a(n) = Sum_{k=0..11} C(n, k).at n=20A219531a(n) = Sum_{i=0..n+1} binomial(2*n,n-i+1).at n=10A277924a(n) = number of subsets of {1,2,...,n} that contain more nonprimes than primes.at n=20A369853