n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 5 |
4 | 35 |
5 | 225 |
6 | 1475 |
7 | 9625 |
8 | 62875 |
9 | 410625 |
10 | 2681875 |
11 | 17515625 |
12 | 114396875 |
13 | 747140625 |
14 | 4879671875 |
15 | 31869765625 |
16 | 208145546875 |
17 | 1359425390625 |
18 | 8878582421875 |
19 | 57987166015625 |
20 | 378721654296875 |
21 | 2473479931640625 |
22 | 16154616201171875 |
23 | 105507880322265625 |
[0,1,5,35,225,1475,9625,62875,410625,2681875, 17515625,114396875,747140625,4879671875, 31869765625,208145546875,1359425390625, 8878582421875,57987166015625,378721654296875, 2473479931640625,16154616201171875, 105507880322265625] |