login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)

A004647 as a simple table

n a(n)
0 1
1 2
2 4
3 10
4 20
5 40
6 100
7 200
8 400
9 1000
10 2000
11 4000
12 10000
13 20000
14 40000
15 100000
16 200000
17 400000
18 1000000
19 2000000
20 4000000
21 10000000
22 20000000
23 40000000
24 100000000
25 200000000
26 400000000
27 1000000000

[1,2,4,10,20,40,100,200,400,1000,2000,4000,10000,
 20000,40000,100000,200000,400000,1000000,2000000,
 4000000,10000000,20000000,40000000,100000000,
 200000000,400000000,1000000000]

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)