163184domain: NAppears in sequencesCoefficient of x^2 in the reduction of the n-th Fibonacci polynomial by x^3->x^2+2.at n=18A192800Number of (w,x,y,z) with all terms in {1,...,n} and w*x>y*z+2.at n=24A212056Number of rich binary words of length n.at n=19A216264E.g.f. equals the series reversion of x - x*log(1+x).at n=6A227457