The string abbcccddddeeeee.... continuously repeats - with a repeating once, b repeating twice and so on, such that after the final z, the letters abbcccddddeeeee.... begin again.
What will be the 2010th letter in the above pattern?
As a bonus, what will be the 2010th letter in the above pattern, if instead - after the final z, the next a repeats 27 times, then b repeats 28 times and so forth?
Once thru the alphabet uses 351 letters (1 + 26) * (26/2).
Five times thru will give the 1755th letter as a final "Z"
The 23 letters A..V use 253 letters.
Hence the 2010th letter will be "W".