login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

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

A138436 as a simple table

n a(n)
1 3
2 27
3 375
4 2058
5 19965
6 46137
7 176868
8 308655
9 803022
10 2560845
11 3574920
12 8661663
13 14473410
14 18366117
15 28655148
16 52255827
17 89339865
18 105546165
19 168728043
20 225483930
21 259085322
22 384570420
23 492308607
24 697919310
25 1073303448

[3,27,375,2058,19965,46137,176868,308655,803022,
 2560845,3574920,8661663,14473410,18366117,
 28655148,52255827,89339865,105546165,168728043,
 225483930,259085322,384570420,492308607,697919310,
 1073303448]

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 3 22:32 EST 2021. Contains 349468 sequences. (Running on oeis4.)