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

 

Logo


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

A025180 as a simple table

n a(n)
2 1
3 2
4 7
5 20
6 60
7 176
8 518
9 1520
10 4461
11 13090
12 38423
13 112828
14 331487
15 974442
16 2866125
17 8434992
18 24838275
19 73181142
20 215729781
21 636275820
22 1877569134
23 5543095404
24 16372140876
25 48377825216
26 143009973875
27 422918975726
28 1251154692297

[1,2,7,20,60,176,518,1520,4461,13090,38423,112828,
 331487,974442,2866125,8434992,24838275,73181142,
 215729781,636275820,1877569134,5543095404,
 16372140876,48377825216,143009973875,422918975726,
 1251154692297]

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 May 7 02:20 EDT 2021. Contains 343636 sequences. (Running on oeis4.)