I often bring up "season one show content" files that can be viewed at the University of Maryland, all of which were scanned and posted on Muppet Wiki's talk page for that place. The guide lists practically every insert for the first season, with a list of episode numbers that each segment appears in (even noting if a segment appears multiple times in a single episode). Of course there are many segments that don't have episode numbers listed, some of which are known to have aired in the first season (one such segment is Jazz #7, which is in some of the first season episodes recently acquired by fans), and there's a few cases where it lists episode numbers for segments that don't appear (it mistakenly lists Gloria singing the alphabet as appearing in the first episode, and I recently saw some Muppet Wiki discussion of episode six not having an insert that had been listed for that episode).
Anyway, the "First Season Show Content" guide lists only one episode for Lucy in the Sky with Diamonds, with "DUMP" written by it, which seems to be what they did for segments that would no longer air after the first season.