Assertion: function's number | /r/HasProperty | denoted u n \displaystyle u_{n
Facets:
Source sentences:
text: In particular, suppose that we seek the total number of ways (denoted U n {\displaystyle U_{n}} ) to tile a 3 × n {\displaystyle 3\times n} rectangle with unmarked 2 × 1 {\displaystyle 2\times 1} domino pieces.