n | a(n) |
---|---|
0 | 1 |
1 | 3 |
2 | 9 |
3 | 36 |
4 | 165 |
5 | 768 |
6 | 4212 |
7 | 24573 |
8 | 146949 |
9 | 994608 |
10 | 6824064 |
11 | 49026783 |
12 | 382079820 |
13 | 3012960603 |
14 | 24957495705 |
15 | 216087717621 |
16 | 1931094309909 |
17 | 17705427261168 |
18 | 169400058948720 |
19 | 1679587464655155 |
20 | 16724057142118920 |
21 | 174698022293109813 |
22 | 1876447876721132955 |
[1,3,9,36,165,768,4212,24573,146949,994608, 6824064,49026783,382079820,3012960603,24957495705, 216087717621,1931094309909,17705427261168, 169400058948720,1679587464655155, 16724057142118920,174698022293109813, 1876447876721132955] |