(phixonline)-->
function ack(integer m, integer n)
if m=0 then
return n+1
elsif m=1 then
return n+2
elsif m=2 then
return 2*n+3
elsif m=3 then
return power(2,n+3)-3
elsif m>0 and n=0 then
return ack(m-1,1)
else
return ack(m-1,ack(m,n-1))
end if
end function
constant limit = 23,
fmtlens = {1,2,2,2,3,3,3,4,4,4,4,5,5,5,6,6,6,7,7,7,7,8,8,8}
atom t0 = time()
printf(1," 0")
for j=1 to limit do
string fmt = sprintf(" %%%dd",fmtlens[j+1])
printf(1,fmt,j)
end for
printf(1,"\n")
for i=0 to 5 do
printf(1,"%d:",i)
for j=0 to iff(i>=4?5-i:limit) do
string fmt = sprintf(" %%%dd",fmtlens[j+1])
printf(1,fmt,{ack(i,j)})
end for
printf(1,"\n")
end for