699072domain: NAppears in sequencesNumber of subsets of {1,2,...,n} which sum to 0 modulo n.at n=23A063776Number of subsets of {1,2,3,...,n} that sum to 0 mod 6.at n=22A068012Number of subsets of {1,2,3,...,n} that sum to 0 mod 12.at n=23A068033Number of solutions to 1 +- 2 +- 3 +- ... +- n == 0 (mod n).at n=23A300190