A162402 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A162402 as a simple table

n	a(n)
0	1
1	40
2	819
3	11440
4	122589
5	1074488
6	8020830
7	52427192
8	306189025
9	1622495952
10	7895219982
11	35623107520
12	150221110689
13	595982725640
14	2237008815175
15	7981961442768
16	27186526166255
17	88708246063240
18	278172606877930

[1,40,819,11440,122589,1074488,8020830,52427192, 306189025,1622495952,7895219982,35623107520, 150221110689,595982725640,2237008815175, 7981961442768,27186526166255,88708246063240, 278172606877930]