180559domain: NAppears in sequencesNumbers k such that 191*2^k+1 is prime.at n=27A032472Values of x in the solutions to x^2 - 8*x*y + y^2 + 11 = 0, where 0 < x < y.at n=12A237262Bisection of the numerators of the convergents of cf(1,4,1,6,1,6,...,6,1).at n=6A341927