279167724890domain: NAppears in sequencesExpansion of 2*x*(1 - x)/(1 - 3*x + x^2).at n=28A052995Number of base 4 n-digit numbers with adjacent digits differing by one or less.at n=27A126358First differences of A137976 after having added two leading ones.at n=22A138298Denominators of A178381(4*n+3)/A178381(4*n+2).at n=27A179133