We give some restricted sum formulas for double zeta values whose arguments satisfy certain congruence conditions modulo 2 or 6, and also give an application to identities showed by Ramanujan for sums of products of Bernoulli numbers with a gap of 6.
"Some restricted sum formulas for double zeta values." Proc. Japan Acad. Ser. A Math. Sci. 89 (3) 51 - 54, March 2013. https://doi.org/10.3792/pjaa.89.51