[001 Fibonatch 수열] 팽이대학교 수학과.

\begin{tikzpicture}
  % ==階段，放物線，
  % 線を引く
  \draw (-1,0)--(0,0);
  \draw (-1,0)--(0,0);
  \foreach \x in {0,0.5,1,...,7.5}
  \foreach \y in {0,1,2,...,15}
{
  \draw ({\x},{\x})-|({(\x)+(0.5)},{(\x)+(0.5)});
  \coordinate (\y) at ({\y/2+0.25},{\y/2});
  \node at ({\y/2},{\y/2})[below right]{\y};
}   
\draw [->](0) parabola bend ($(0)+(0.25,0.75)$) (1);  % 1段飛ばし
\draw [->](1) parabola bend ($(1)+(0.5,1.5)$)(3);     % 2段飛ばし
\draw [->](3) parabola bend ($(3)+(0.25,0.75)$) (4);  % 1段飛ばし
\draw [->](4) parabola bend ($(4)+(0.5,1.5)$)(6);     % 2段飛ばし

\end{tikzpicture}