A271216 - 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

A271216 as a simple table

n	a(n)
0	1
1	2
2	4
3	8
4	32
5	64
6	384
7	768
8	6144
9	12288
10	122880
11	245760
12	2949120
13	5898240
14	82575360
15	165150720
16	2642411520
17	5284823040
18	95126814720
19	190253629440
20	3805072588800

[1,2,4,8,32,64,384,768,6144,12288,122880,245760, 2949120,5898240,82575360,165150720,2642411520, 5284823040,95126814720,190253629440,3805072588800]