# Square triangular number Calculator

## Calculates a table of the square triangular numbers.

 initial value k increment repetition 6digit10digit14digit18digit22digit26digit30digit34digit38digit42digit46digit50digit
 $\normal Square\ triangular\ number\\(1)\ triangular\ number:\\\hspace{30} {\large\frac{n(n+1)}{2}}\hspace{15} {\large1},\ 3,\ 6,\ 10,\ 15,\ 21,\ 28,\ {\large36},\ ...\\(2)\ perfect\ square:\\\hspace{40} n^2\hspace{37} {\large1},\ 4,\ 9,\ 16,\ 25,\ {\large36},\ 49,\ 64,\ ...\\(3)\ Square\ triangular\ number :\hspace{95} 1,\ 36,\ 1225,\ ...\\\hspace{40}N_k={\large\frac{\left((1+\sqrt{2})^{2k}-(1-\sqrt{2})^{2k}\right)^2}{32}}\\$

Square triangular number
 [1-1] /1 Disp-Num5103050100200
[1]  2015/03/16 17:44   Female / Under 20 years old / Elementary school/ Junior high-school student / A little /
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