The Function (Editorial)

Notice that samples have numbers around some number $+0.23$ , at the same time notice the last term of the math expression is reduced to $676767/67\times \pi =10101\pi \approx 31733.23$

Now we need to get formula for integer part which can be got with samples pattern observation which is $n^3+n^2+n$ thus the final formula is n^3+n^2+n+10101\pi.