I formulated the question: is it possible to create a number system in which:

1=1
2=3
3=7
4=8
5=21
6=49
.....

Also I have a question, how did the creator access the addresses above puzl#160 repeatedly? I.e. he was transferring btc from these addresses to smaller addresses. Did he really save every key to the address and "manually" (using an algorithm) spell them out?