Question: discrete sequence

This sequence has a special name does anyone know what it is? i mean id look it up on oeis but unfortunately the asthetics of their presentation dont meet my strict standards, so yes i did work out an expression for it but if anyone knows the easiest in a singular expression.. very helpful right now.

 

1, 1, 2, 2, 3, 3, 4, 4, 5, 5

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