4198399domain: NAppears in sequencesNumber of n X n circulant singular matrices over GF(2).at n=22A086324a(n) = (2^n + 1)^2 - 2.at n=10A093069Smallest m such that A116361(m) = n.at n=23A116362Expansion of x*(2 - 7*x + 2*x^2)/((1-x)*(1-4*x)*(1-2*x)).at n=11A130567Numbers k such that A163511(k) is an eleventh power.at n=16A366391