A052597 - 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

A052597 as a simple table

n	a(n)
0	1
1	0
2	2
3	6
4	24
5	240
6	1440
7	15120
8	161280
9	1814400
10	25401600
11	359251200
12	5748019200
13	99632332800
14	1830744115200
15	36614882304000
16	774143225856000
17	17428683976704000
18	416154290872320000
19	10461478635159552000

[1,0,2,6,24,240,1440,15120,161280,1814400, 25401600,359251200,5748019200,99632332800, 1830744115200,36614882304000,774143225856000, 17428683976704000,416154290872320000, 10461478635159552000]