Preparation. 1. Combine first 6 ingredients in a large bowl, stirring with a whisk. Add watermelon and next 5 ingredients (through tomatoes); toss gently. Cover and refrigerate 2 hours or until thoroughly chilled. Sprinkle with goat cheese just before serving.
Numbers (of objects) that can be arranged into a square array are called square numbers. Not a square number: Square arrays must be full if we are to count the number as a square number. Here are 12 pennies arranged in a square, but not a full square array. The number 12 is not a square number.
The first few numbers that are neither square nor the sum of a square and a prime are 10, 34, 58, 85, 91, 130, 214, ... (OEIS A020495). It is conjectured that, other than, and, there are only a finite number of squares having exactly two distinct nonzero digits (Guy 1994, p. 262).