(PARI)
\\ The first row of the generalized Wythoff array W(h),
\\ where h is an irrational number between 1 and 2.
row1(h, m) = {
my(
a=vector(m, n, floor(n*h)),
b=setminus(vector(m, n, n), a),
w=[a[1]^2, b[a[1]]],
j=3
);
while(1,
if(j%2==1,
if(w[j-1]<=#a, w=concat(w, a[w[j-1]]), return(w))
,
if(w[j-2]<=#b, w=concat(w, b[w[j-2]]), return(w))
);
j++
);
w
}
