The OEIS is supported by the many generous donors to the OEIS Foundation.
A220238 as a simple table
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 23 |
| 4 | 78 |
| 5 | 292 |
| 6 | 1066 |
| 7 | 3922 |
| 8 | 14420 |
| 9 | 53082 |
| 10 | 194996 |
| 11 | 716575 |
| 12 | 2632158 |
| 13 | 9670362 |
| 14 | 35522394 |
| 15 | 130493059 |
| 16 | 479334100 |
| 17 | 1760731483 |
| 18 | 6467453104 |
| 19 | 23755979899 |
| 20 | 87258200522 |
| 21 | 320507504035 |
| 22 | 1177245881354 |
| 23 | 4324093291463 |
| 24 | 15882595755420 |
[1,6,23,78,292,1066,3922,14420,53082,194996, 716575,2632158,9670362,35522394,130493059, 479334100,1760731483,6467453104,23755979899, 87258200522,320507504035,1177245881354, 4324093291463,15882595755420] |