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!)

A247076 as a simple table

n a(n)
0 1
1 2
2 6
3 20
4 62
5 194
6 612
7 1922
8 6038
9 18980
10 59646
11 187442
12 589076
13 1851266
14 5817894
15 18283700
16 57459518
17 180575906
18 567489348
19 1783428098
20 5604714422
21 17613731780
22 55354032894
23 173959101458
24 546694927604
25 1718078222594
26 5399341807686
27 16968314698580

[1,2,6,20,62,194,612,1922,6038,18980,59646,187442,
 589076,1851266,5817894,18283700,57459518,
 180575906,567489348,1783428098,5604714422,
 17613731780,55354032894,173959101458,546694927604,
 1718078222594,5399341807686,16968314698580]

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 9 19:51 EST 2019. Contains 329879 sequences. (Running on oeis4.)