count lattice2 by mitchs

f=->r,a=4,m=1{r%4>2?1:r<0?0:m*f[r+1]+f[r-a,a+8,2]}
51.times{|n|p f[4*n*n]}

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

To protect the system from spam, please input your favorite sport (hint: I believe its name must start with 'g', case insensitive)

download

return to the top page