2⁴ = 16 is the vertex count of a tesseract — the 4-dimensional hypercube, the one everyone knows: a cube nested inside a cube, every inner vertex tied to its outer twin, turning through the fourth dimension. 16 vertices, 32 edges, each a 4-bit address (0000–1111, hex 0–F). It's also the width of one STOICHEION register.
the 16 rung · 2⁴ · a tesseract · 16 vertices · 32 edgesReal 4-cube, real math. The exact tesseract graph: 16 vertices (the 4-bit strings), joined when they differ in one bit — 4·16/2 = 32 edges, verified. Rotated in the x–w and y–w planes and projected 4D→3D→2D (perspective, no library), which produces the classic inner-cube / outer-cube form. What's LIT: the graph and 2⁴=16. Completing the cube family beside the 3-cube (512) and 5-cube (32) — same object, one dimension apart each.