OFFSET
1,2
LINKS
A. Fraenkel and C. Kimberling, Generalized Wythoff arrays, shuffles and interspersions, Discrete Mathematics 126 (1994) 137-149.
PROG
(PARI)
\\ Row i of the generalized Wythoff array W(h),
\\ where h is an irrational number between 1 and 2,
\\ and m is the number of terms in the vectors a and b.
row(h, i, m) = {
my(
a=vector(m, n, floor(n*h)),
b=vector(m, n, floor(n*h/(h-1))),
w=[a[a[i]], b[a[i]]],
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++
)
}
allocatemem(10^9)
row(Pi-2, 1, 10^7)
CROSSREFS
KEYWORD
nonn,more,hard
AUTHOR
Colin Barker, Nov 04 2014
STATUS
approved