3 ms·
p^2 - 1 = 24n [1] [1] https://puzzles.nigelcoldwell.co.uk/fifteen.htm https://puzzles.nigelcoldwell.co.uk/fifteen.htm
by mikorym 7y ago
p^2 - 1 = 24n [1]
[1] https://puzzles.nigelcoldwell.co.uk/fifteen.htm https://puzzles.nigelcoldwell.co.uk/fifteen.htm