The exact number for the 9th iteration is 189345699699803478502456213711361. Here is an algorithm for computing them efficiently: https://gist.github.com/robin

The exact number for the 9th iteration is 189345699699803478502456213711361. Here is an algorithm for computing them efficiently: https://gist.github.com/robinhouston/6251775 https://gist.github.com/robinhouston/6251775