Relation between rounds eras and validation set eras

[wigglemuse]

see here

Numerai rounds to era

Hi, is there a mapping from the numerai rounds, like 339 resolved last week, to training/validation data eras? Round 1033 seems to be the latest era with main target not NaN. So I assume that round corresponds to 339? Rounds 1034 to 1038 inclusive all have NaN for the main target, so I presume they correspond to Numerai Rounds 344, 349, 354, 359, 364? Thanks.