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!)

A129640 as a simple table

n a(n)
1 0
2 155
3 464
4 939
5 1764
6 3515
7 6260
8 11055
9 21252
10 37247
11 65192
12 124623
13 217848
14 380723
15 727112
16 1270467
17 2219772
18 4238675
19 7405580
20 12938535
21 24705564
22 43163639
23 75412064
24 143995335
25 251576880
26 439534475
27 839267072
28 1466298267
29 2561795412
30 4891607723

[0,155,464,939,1764,3515,6260,11055,21252,37247,
 65192,124623,217848,380723,727112,1270467,2219772,
 4238675,7405580,12938535,24705564,43163639,
 75412064,143995335,251576880,439534475,839267072,
 1466298267,2561795412,4891607723]

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 13 17:17 EST 2019. Contains 329970 sequences. (Running on oeis4.)