A156952 - 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

A156952 as a simple table

n	a(n)
0	1
1	1
2	1
3	1
4	5
5	1
6	1
7	105
8	105
9	1
10	1
11	8925
12	187425
13	8925
14	1
15	1
16	3043425
17	5432513625
18	5432513625
19	3043425
20	1
21	1
22	4154275125
23	2528644954460625
24	214934821129153125
25	2528644954460625
26	4154275125
27	1

[1,1,1,1,5,1,1,105,105,1,1,8925,187425,8925,1,1, 3043425,5432513625,5432513625,3043425,1,1, 4154275125,2528644954460625,214934821129153125, 2528644954460625,4154275125,1]