[or reverse it for axanthic heterozygous snow]

Double heterozygous for snow = a⁺b⁺ X Albino heterozygous for axanthic = aab⁺

The following are averages over a long period of time (out of a possible 16) you get:

2 Heterozygous albino = a⁺⁺⁺
2 albino = aa⁺⁺
4 Double heterozygous snow = a⁺b⁺
4 Albino heterozygous axanthic = aab+
2 Axanthic heterozygous for albino = a⁺bb
2 Snow = aabb