Determine if the Sequence is Arithmetic: 1, 4, 9, 16, 25, 26, ...

Picked one by one from a mixed channel. Transcript check: both title readers certain; 2 of 5 sampled certain picks confirmed by transcript, none failed. Channel rule: Include only videos whose titles name a specific math problem or technique being worked or taught (e.g. 'Partial Derivative of ...', 'How to Solve ...', 'Find the Equation of ...', '... Full Tutorial'), and exclude all motivational, advice, book, study-tips, roadmap and promotional videos.

A 2-minute video from The Math Sorcerer: “Determine if the Sequence is Arithmetic: 1, 4, 9, 16, 25, 26, ...”.

Video by The Math Sorcerer, played through YouTube's embedded player.