How about 1 + 11 + 111 + 1111 + n

Private Function Add(Byval n As Integer) As Long
Dim Sum As Long
Sum = Sum + n
If n > 1 Then
Sum = Sum + Add(n-1)
End if
Add = Sum
End Function

RELATED INFORMATIONS

1. Using the sum of general term, 1 + 11 + 111 + +111… The sum of 1n ones
2. Find the rules and fill in the numbers: 1250, 20625, 17125, 14, (), (), (), ()
3. Find the rule 2,5,11,23, (), ()
4. 2 5 6 11 23 () () find the law
5. The greatest common factor of 20 and 15, 36 and 9, 51 and 34, 18 and 90
6. 56×165÷(7×11)+144×13÷156 (28.8＋28.5＋28.7＋28.1＋28.6）÷5 41.2×8.1＋11×9.25＋537×0.19 Who is the quickest to give the reward! 1. Of course, I know the answer,
7. 1. 5 + 3 = 8; 8 = 56 / 7; 56-5 = 51. Is the answer correct? 2. Xiao Hua does an integer addition problem, regarding 3 as 8 and 9 as 6. The sum is 356. What's the correct answer? 356-68 = 288; 288 + 93 = 381
8. Simple calculation of 0.865 * 51% + 51 * 35.5% / 2 * 1 / 50 + 4.9% * 12 and 1 / 5 There must be a process! Online and so on!
9. How to simplify the operation of 1 + 10 + 4 (10 / 35) + 2 (24 / 63) + 1 (51 / 99) + 1 (7 / 143)
10. 6 questions on page 23 of the mathematics textbook for the first semester of the second grade of the people's Education Press 11.3, 6 questions
11. How about 1 + 11 + 111 + 1111
12. What is 1 + 11 + 111 + 1111
13. 1+1+11.111.1111
14. 1 times 1, 11 times 11111 times 1111 times 1111, find the law
15. 1＋1－1－1＋1－1＋11－111－1111＋111＋1÷111÷1÷1111÷1－1111÷1－11×11－11×1－1111－111＋111＝?
16. What are the climates of Beijing and Tokyo? What are the common characteristics of the two climates?
17. Beijing's geographical position in the world, Beijing's terrain and Beijing's climate characteristics; what are China's geographical position, terrain and climate characteristics in the world?
18. From the perspective of climate, why is the Rio Summer Olympics held from August 15 to 21, 2016
19. Why is the 29th Summer Olympic Games held in Beijing in July and August (considering climate conditions) instead of September and October? Isn't it raining a lot in July and August
20. Climate characteristics of Beijing The climate and characteristics of Beijing?