http://z5lcip2ba3ec6v5za5snjzncpvr6ocyvqnkox2alerut6ruozpjtvkqd.onion/math/catalog
The positive numbers are: 0, 1, 11̃, 10, 11, 11̃1̃, 11̃0, ... (0, 1, 2, 3, 4, 5, 6, ...) The negative numbers are: 1̃, 1̃1, 1̃0, 1̃1̃, 1̃11, 1̃10, 1̃11̃, ... (-1, -2, -3, -4, -5, -6, -7, ...) This system has some nice properties: 1.