Floyd's triangle
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Floyd's triangle is a right angled triangular array of natural numbers. It is named after Robert Floyd. It is defined by filling the rows of the triangle with consecutive numbers, starting with a 1 in the top left corner:
| 1 | ||||
| 2 | 3 | |||
| 4 | 5 | 6 | ||
| 7 | 8 | 9 | 10 | |
| 11 | 12 | 13 | 14 | 15 |
The numbers along the right edge of the triangle are the triangular numbers.
