103974domain: NAppears in sequencesNumbers k such that 5^k == -1 (mod k-1).at n=9A055688Number of symmetric types of (5,2n)-hypergraphs under action of complementing group C(5,2).at n=6A055788a(n) = 100*n^2 - 151*n + 57.at n=32A157626Sum of the j-th number with binary weight n-j+1 over all j in [n].at n=15A361074