\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{fit,positioning,hobby}
\begin{document}
\begin{tikzpicture}
\node (1) at (0,0) {$1$};
\node (2) at (-1,1) {$2$};
\node (3) at (1,1) {$3$};
\node (4) at (-2,2) {$4$};
\node (5) at (-1,2) {$5$};
\node (6) at (1,2) {$6$};
\node (7) at (2,2) {$7$};
\node (8) at (-4,3) {$8$};
\node (9) at (-3,3) {$9$};
\node (10) at (-2,3) {$10$};
\node (11) at (-1,3) {$11$};
\node (12) at (1,3) {$12$};
\node (13) at (2,3) {$13$};
\node (14) at (3,3) {$14$};