85591domain: NAppears in sequencesDivisors of 2^50 - 1.at n=28A003554Strong pseudoprimes to base 20.at n=23A020246a(n) = 10*a(n-1) - 19*a(n-2) with a(0)=1, a(1)=5.at n=6A146962Szeged index of the prism graph C_n X P_2 (n >=3).at n=28A245829Number of minimal edge covers in the n-gear graph.at n=13A290762