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!)

A147176 as a simple table

n a(n)
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 5
9 25
10 49
11 81
12 173
13 659
14 1949
15 6591
16 26979
17 151047
18 720521
19 4123761
20 21126009
21 143739573

[1,1,1,1,1,1,1,5,25,49,81,173,659,1949,6591,26979,
 151047,720521,4123761,21126009,143739573]

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 2 11:44 EST 2021. Contains 349440 sequences. (Running on oeis4.)