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

 

Logo

Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS").
Other ways to donate

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

A027939 as a simple table

n a(n)
3 1
4 29
5 247
6 1300
7 5270
8 18228
9 56967
10 166681
11 467301
12 1274856
13 3419252
14 9076280
15 23945893
16 62955061
17 165188091
18 432974764
19 1134224458
20 2970340412
21 7777628427
22 20363608737
23 53314542953
24 139581703056
25 365432651464
26 956718812272
27 2504726904937
28 6557465674125

[1,29,247,1300,5270,18228,56967,166681,467301,
 1274856,3419252,9076280,23945893,62955061,
 165188091,432974764,1134224458,2970340412,
 7777628427,20363608737,53314542953,139581703056,
 365432651464,956718812272,2504726904937,
 6557465674125]

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 4 21:14 EST 2020. Contains 338938 sequences. (Running on oeis4.)