User blog comment:Alejandro Magno/Make the list bigger!/@comment-5029411-20140928224207/@comment-25371339-20140928234624

10. 7, the first number in the sequence 7, 77, 777...

11. 8, 2^3, 4*2.

12. 9, 10 - 1, 4.5*2.

13. 10, 10^1, 1 followed by 1 zero.