184717domain: NAppears in sequencesNumbers k that divide 9^k + 4^k.at n=6A045593a(n) = n^2*(n^3-n+2)/2.at n=13A101377Number of strictly increasing arrangements of n numbers in -(n+5)..(n+5) with sum zero.at n=8A188179Number of nondecreasing arrangements of n numbers in -(n+1)..(n+1) with sum zero.at n=8A188205