26843552domain: NAppears in sequencesNumber of subsets of {1,2,3,...,n} that sum to 0 mod 5.at n=27A068011Number of subsets of {1,2,3,...,n} that sum to 0 mod 10.at n=28A068031Number of subsets of {1,2,3,...,n} that sum to 0 mod 20.at n=29A068041