1 1 = 1
11 11 = 121
111 111 = 12321
1111 1111 = 1234321
11111 11111 = 123454321
111111 111111 = 12345654321
the pattern is that with each '1' added, there is another consecutive number added. if there are 3 ones, it I'll go up to 3 and then back down to 1 (111*111=12321)
it is the same like that for every one.