Basic LESS loop to generate as many numbered classes as necessary, extended to keep the CSS DRYer.

example-loop.css

.example-1,
.example-2,
.example-3,
.example-4,
.example-5 {
    /* stuff */
    
}

example-loop.less

.example-1 {
    /* stuff */
}
.example {
    // Loop
	.loop(@index) when (@index > 1) {
		.loop((@index - 1));
		&-@{index} {
			&:extend(.example-1);
		}
	}
	.loop(@index) when (@index =< 1) {}
	// Generate
	.loop(5);
}