A three-row scan shows how starting copies shift the first threshold crossing. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.
highlighted = computed this step
Three starts make three first-crossing cycles
The threshold stays 24. Starts 2, 3, and 6 reach at cycles 4, 3, and 2.
2→43→36→2
The middle row is the original three-copy case
Start 3 gives counts 3,6,12,24,48, so the first crossing is cycle 3.
3,6,12,24,48
More starting copies move the crossing earlier
Start 6 reaches 24 at cycle 2, two cycles earlier than the low-start row.