A272257 - 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

A272257 as a simple table

n	a(n)
0	1
1	5
2	24
3	112
4	528
5	2392
6	10592
7	43053
8	174405
9	703365
10	2824445
11	11326709
12	45323601
13	181336521
14	725609588
15	2902625256

[1,5,24,112,528,2392,10592,43053,174405,703365, 2824445,11326709,45323601,181336521,725609588, 2902625256]