| prime(j0), j0 ≤ j * 2 + 1, j + 2 ≤ j0, 0 < j, ∃ i0. (fac(j) * fac(j + 1)) * i0 = fac(j * 2 + 1), 0 ≤ j ⊦ j0 | fac(2 * j + 1) / (fac(j + 1) * fac(j)) |
(fac(j) * fac(j + 1)) * i = fac(j * 2 + 1), 0 ≤ j, 0 < j, j + 2 ≤ j0, j0 ≤ j * 2 + 1, prime(j0) ⊦ j0 | fac(2 * j + 1) / (fac(j + 1) * fac(j))