Hard Logic Puzzle

#56

A student wants to draw points on a paper in a mathematical ordered way. (i.e. in rows)
Also, he wants to create a total of 19 rows of points.

What should be the minimum number of points required by the student to have 19 rows ???
(Considering that there should be more than 2 points in line to be counted as a row)

  Difficulty Level - 5/5

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  Solution : 

   19 points.
   A B C 
   E F G H
   I J K L
   M N O P
        R S T

5 Horizontal Rows
4 Vertical Columns
4 Diagonals with slope 1 (ROL, NKH, MJG, IFC)
4 Diagonals with slope -1 (SNI, TOJE, PKFA, LGB)
2 Diagonals with slope -2 (AJS, BKT)