Wow, neat seki. It’s quite nice how it sprawls out from the center and toward the edges.
I had a 62 point seki (counting all stones + shared liberties + one eye each per group) covering most of the top-right quadrant in this game:
It was the largest seki that I had seen in an actual game until I saw your game.
I asked for a review for my game here:
@mark5000 pointed out some chances for it to have been prevented: https://online-go.com/review/29303