Transparent fraction

• 2026-08-28 [Conjecture] The common-box transparent fraction does not grow to 24.5%: GRID(n) = (n-1)/(4n) for odd n reproduces 1/6, 2/9, 13/54, 27/110 at n = 3, 9, 27, 55, reads 0.2495463 at n = 551 and 0.2499504 at n = 5041, and its limit is 1/4; 24.5% is the n = 55 value, and at n = 0 the normalization is undefined.