208824domain: NAppears in sequencesNumbers n such that 89*2^n-1 is prime.at n=19A050570Number of minimal dominating sets in the n-Andrásfai graph.at n=25A286879'Geobonnaci' sequence: a(1)=a(2)=1, thereafter a(n) = round( 2 * sqrt(a(n-1) * a(n-2)) ).at n=27A322332