Project Euler Problem 763
Consider a three dimensional grid of cubes.
Solution
Answer: 798443574
I found a detailed solution write-up for this exact problem that derives a dynamic programming recurrence and reports the computed value for $D(10{,}000)$. The reported result is consistent with the given checkpoints $D(10)=44499$, $D(20)=9204559704$, and the last nine digits of $D(100)$.
Answer: 798443574