Pin any triangle n to a year, choose whether climbing the spiral runs time forward or back, and the app surfaces every triangle whose hypotenuse is a whole number — each mapped to its year, with notable events drawn live from that year’s Wikipedia page.
Anchor: row n=— → year —Step: each +1 in n = —Rational rows shown: 54
Set an anchor and trace the spiral.
Rows with a whole-number hypotenuse (n+1 is a perfect square) will appear here, year by year.