https://www.youtube.com/watch?v=OKhacWQ2fCs
https://arxiv.org/abs/1602.06208v2
https://arxiv.org/abs/1706.10206
Here's a website that's supposed to do the algorithms for you, but I can't seem to get it to work. Maybe you'll have better luck?
http://somethingorotherwhatever.com/sum-of-3-palindromes/