In 2008, Muneta found explicit evaluation of the multiple zeta star value $$\zeta ^\star (\{3, 1\}^d)$$ , and in 2013, Yamamoto proved a sum formula for values on 3–2–1 indices. this paper, we provide another way deriving formulas mentioned above. It is based our previous work generating functions also constructions restricted sums alternating Euler sums. As result, obtained are simpler computa...