A135484 - 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

A135484 as a simple table

n	a(n)
1	1
2	9
3	252
4	16636
5	48844761
6	13109538777
7	232643623525984
8	144347831699381856
9	8863082467484200477785
10	100000008863082467484200477785
11	192043424966613562971631041769596

[1,9,252,16636,48844761,13109538777, 232643623525984,144347831699381856, 8863082467484200477785, 100000008863082467484200477785, 192043424966613562971631041769596]