Sum of Lucas numbers
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Revision as of 00:17, 25 May 2017 by Tom (talk | contribs) (Created page with "==Theorem== The following formula holds: $$\displaystyle\sum_{k=1}^n L(k) = L(n+2)-3,$$ where $L(k)$ denotes the $k$th Lucas number. ==Proof== ==References...")
Theorem
The following formula holds: $$\displaystyle\sum_{k=1}^n L(k) = L(n+2)-3,$$ where $L(k)$ denotes the $k$th Lucas number.
