http://arungjeramcitarik.com/Scarf-Chemo-Cap-Hair-Loss-Cap-Hats-?amp;-Caps-288732/ An insight about representing sub-sequence of numbers or range.
Website http://www.cs.utexas.edu/~EWD/ewd08xx/EWD831.PDF
Subsequence_of_numbers (PDF, local copy)
An insight about representing sub sequence of numbers…
