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!)

A028403 as a simple table

n a(n)
1 4
2 12
3 40
4 144
5 544
6 2112
7 8320
8 33024
9 131584
10 525312
11 2099200
12 8392704
13 33562624
14 134234112
15 536903680
16 2147549184
17 8590065664
18 34360000512
19 137439477760
20 549756862464
21 2199025352704
22 8796097216512
23 35184380477440
24 140737505132544
25 562949986975744

[4,12,40,144,544,2112,8320,33024,131584,525312,
 2099200,8392704,33562624,134234112,536903680,
 2147549184,8590065664,34360000512,137439477760,
 549756862464,2199025352704,8796097216512,
 35184380477440,140737505132544,562949986975744]

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 29 09:59 EDT 2024. Contains 371268 sequences. (Running on oeis4.)