en.wikipedia.org/wiki/List_of_OEIS_sequences

This article provides a list of integer sequences in the On-Line Encyclopedia of
Integer ... A000027 · Natural numbers, {**1**, **2**, **3**, **4**, 5, **6**, 7, 8, 9, 10, …} The natural
.... 15, 13, 18, 12, 28, …} σ(n) := σ**1**(n) is **the sum** of divisors of a positive integer n.

socratic.org/questions/what-is-the-sum-of-1-6-2-3-and-1-4

Apr 7, 2016 **...** To find **sum 16**+**23**+**14** , we should first convert them to common denominator. As
LCM of **6**,**3** and 4 is 12 , we will have to multiply denominators ...

socratic.org/questions/how-to-find-the-sum-of-1-6-2-3

Jul 24, 2017 **...** **16**+**23**=**16**+**46**=5**6**. Explanation: We do it by having the denominators be the
same. We do that by using creative forms of the number **1**. **16**+**23**.

answers.yahoo.com/question/index?qid=20100608055237AAV0FuA

Least common denominator (LCD) of the **3** fractions: **6** = x * **2** * x * **3 3** = **1** * x * x *
**3 4** = x * **2** * **2** * x x = x * **2** * **2** * **3** = 2² * **3** = **4** * **3** = 12. **Sum** of ...

mathforum.org/library/drmath/view/72426.html

... **3**, and **6** have reciprocals whose **sum** equals **1** since **1**/**2** + **1**/**3** + **1**/**6** = **1**. ... Our
first five numbers are **2**, **4**, 8, 16, and 32; **the sum** of the ...

www.skillsyouneed.com/num/fractions.html

Examples include ^{1}/**2**, ^{3}/**4** and ^{7}/8. Improper ... + ^{1}/**6**. The smallest number that
will divide by both denominators (5 and **6**), is 30. ... Your **sum** is therefore ^{3}/**4** - ^{2}/**4**
.

www.corestandards.org/Math/Content/NF

Recognize and generate simple equivalent fractions, e.g., **1**/**2** = **2**/**4**, **4**/**6** = **2**/**3**. ...
CCSS.Math.Content.**4**.NF.B.**3**. Understand a fraction a/b with a > **1** as a **sum** of ...

www.khanacademy.org/math/arithmetic/fraction-arithmetic/arith-review-add-sub-fractions/v/visually-adding-fractions-with-unlike-denominators

Sal adds 5/**6**+**1**/**4** using a fraction model for help. ... Actually, 5/**6** x **2** = 10/**6**, or **1 4**/
**6** (can be simplified to **1 2**/**3**). But they (5/**6** and 10/12) are equivalent. 5 Votes.

www.quora.com/Find-the-sum-of-the-following-sqrt-1+1-1-2+1-2-2-+-sqrt-1+1-2-2+1-3-2-+-dotsb+-sqrt-1+1-2007-2+1-2008-2

Now that we have the correct question (see comments above), we can answer it.
Note that [math]**1** + \dfrac{**1**}{n^**2**} + \dfrac{**1**}{(n+**1**)^**2**}[/math] [math]= \dfrac{n...