A152553 - 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

A152553 as a simple table

n	a(n)
0	1
1	1
2	9
3	339
4	44521
5	19059921
6	25799597265
7	108657870607875
8	1410396873934264497
9	56078100848527445045121
10	6801233273726638573734096441
11	2508450630100541880792088526933139

[1,1,9,339,44521,19059921,25799597265, 108657870607875,1410396873934264497, 56078100848527445045121, 6801233273726638573734096441, 2508450630100541880792088526933139]