Search:

PM'ed code to Elkvis and Matticus

My guess is this.


1
2 4
3 6 9
4 8 12 16
5 10 15 20 25
6 12 18 24 30 36
7 14 21 28 35 42 49

I'm declaring this the worst question of the month, and it's only the first day!

"...and without using a..."
You put the entire question in the title, but it lost key information at the end....