Exactly as described, this reports the specific frame size associated with one letter position within a given EMIX sequence, indexed by both the sequence's ID and the letter's position in that sequence. This is essentially a decoded, per-position view of the compact letter-string stored in cienaCesBenchmarkEmixSequence, useful for management software that wants to enumerate the actual numeric frame sizes a sequence will generate without itself implementing the letter-to-size lookup table. For example, for a sequence "abu" with u set to 594, querying position 3 of this table would return 594, decoding what the raw letter "u" actually means for that specific sequence.