178465domain: NAppears in sequencesa(n) is square mod a(i), i < n; a(n) nonsquare; a(1) = 2.at n=25A034901Numbers k such that k^k = k (mod prime(k)).at n=11A177005a(0) = 1 by convention; for n>0, a(n) is the number of points in the n-th figure shown in A255011 (meaning the figure with 4n points on the perimeter).at n=13A331449