How many pairs of positive integers (m,n) satisfy \(m^2 + n < 22\) ?
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\(\{m,n\} \subset\mathbb N\\ \mathbb L=m^2+n\\ \mathbb L\in \mathbb \{\mathbb R<22\}\)
\(n=1\to m\in \{1,2,3,4 \}\\ n=2\to m\in \{1,2,3,4 \}\\ n=3\to m\in \{1,2,3,4 \}\\ n=4\to m\in \{1,2,3,4 \}\\ n=5\to m\in \{1,2,3,4 \}\)
\(n=6\to m\in \{1,2,3 \}\\ n=7\to m\in \{1,2,3 \}\\ n=8\to m\in \{1,2,3 \}\\ n=9\to m\in \{1,2,3 \}\\ n=10\to m\in \{1,2,3 \}\\ n=11\to m\in \{1,2,3\}\)
\(n=12\to m\in \{1,2,3 \}\\ n=13\to m\in \{1,2 \}\\ n=14\to m\in \{1,2 \}\\ n=15\to m\in \{1,2 \}\\ n=16\to m\in \{1,2 \} \)
\(n=17\to m\in \{1,2 \}\\ n=18\to m=1\\ n=19\to m=1 \\ n=20\to m=1\\ \)
53 pairs of positive integers (m,n) satisfy m2 + n < 22
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