1677728domain: NAppears in sequencesNumber of subsets of {1,2,3,...,n} that sum to 0 mod 5.at n=23A068011Number of subsets of {1,2,3,...,n} that sum to 0 mod 10.at n=24A068031Number of subsets of {1,2,3,...,n} that sum to 0 mod 20.at n=25A068041