Ok, so it's c145 (I know!) but here's a working example of the jump from na transform to the correct record containing (an).
In (1,1) the na transform record has x=11
SQRT(2d) = SQRT(12 * 2) = 4 remainder 8
x=11 - 4 = 7 = correct x value at the (na) element:
{1:1:32:7:25:41}