login
This site is supported by donations to The OEIS Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

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

A001604 as a simple table

n a(n)
0 11
1 31
2 151
3 911
4 5951
5 40051
6 272611
7 1863551
8 12760031
9 87424711
10 599129311
11 4106261531
12 28144128251
13 192901135711
14 1322159893351
15 9062207833151
16 62113268013311
17 425730597768451
18 2918000731816531
19 20000274041790911
20 137083916295800111
21 939587136717207031
22 6440026032054760351

[11,31,151,911,5951,40051,272611,1863551,12760031,
 87424711,599129311,4106261531,28144128251,
 192901135711,1322159893351,9062207833151,
 62113268013311,425730597768451,2918000731816531,
 20000274041790911,137083916295800111,
 939587136717207031,6440026032054760351]

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 6 08:53 EST 2019. Contains 329788 sequences. (Running on oeis4.)