Arghh- I did not write my post completely. This is what I have tried before as well. But the results with the changed formula are not correct as well:
prev: 14113243 curr:14114575 delta:34 <--something of 1331 would be right here
prev: 14116795 curr:14118127 delta:35
prev: 14120347 curr:14121680 delta:34
prev: 14123900 curr:14125232 delta:34