The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 514920 |
| 2 | 1246585 |
| 3 | 5347670 |
| 4 | 19771628 |
| 5 | 39029574 |
| 6 | 115919394 |
| 7 | 317271378 |
| 8 | 756210536 |
| 9 | 2131836574 |
| 10 | 5828147664 |
| 11 | 15609807360 |
| 12 | 43074413716 |
| 13 | 116962517460 |
| 14 | 315815849814 |
| 15 | 863675994118 |
| 16 | 2358777950090 |
| 17 | 6431658379770 |
| 18 | 17567133145546 |
| 19 | 47951743101422 |
[514920,1246585,5347670,19771628,39029574, 115919394,317271378,756210536,2131836574, 5828147664,15609807360,43074413716,116962517460, 315815849814,863675994118,2358777950090, 6431658379770,17567133145546,47951743101422] |