68720001023domain: NAppears in sequencesPrimes of the form (2^n + 1)^2 - 2 = 4^n + 2^(n+1) - 1.at n=10A091514a(n) = (2^n + 1)^2 - 2.at n=17A093069Expansion of x*(2 - 7*x + 2*x^2)/((1-x)*(1-4*x)*(1-2*x)).at n=18A130567