How many of the first 100 rows contain at least one even entry and no odd entries other than
If you mean one:
You could find help here:
I have another method doing it though:
Rows 3, 5, 9, 17.. all follow this pattern.
We could rewrite these numbers as 2^1+1, 2^2+1, 2^3+1...the largest row that follows this pattern is 2^6+1 or 65.
There are 6 numbers in this pattern.