Given inputs M and N (in that order), output an MxN matrix whose entries are equal to the sum of their indices.
Example input/output pairs:
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Input: 1,2
Output: [2,3]
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Input: 2,2
Output: [2 3; 3 4]
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Input: 3,2
Output: [2,3; 3 4; 4 5]
Marginally related: my "outer.m" on FileExchange.
Additional test cases have been added.