- 6N with 3 numbers (1, 9 and 0)
- one "0" , two "1", and three "9"
-with 101 and 999 interlaced as a semi-palindrome
- 101, historically, would mean an introductory course and today as a generic which means tutorial on anything, at any level
- 999 can mean (threefold) fibonacci as in trading /...