Mathemania

Goal of the game: find all elements of a numerical sequence.
The first 3 elements are shown at the game start. You have to define the rule of sequence generation and add all missing elements one by one.
Total 25 numbers on the screen, some of them belong to the sequence, some not. Tap numbers to add them to the sequence.
Easy level: wrong numbers are highlighted, right sequence is partially shown below your result.

Medium level: wrong numbers are highlighted, right sequence is not shown.

Hard level: no any hints.