The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1469 |
| 2 | 3286 |
| 3 | 10885 |
| 4 | 25882 |
| 5 | 107651 |
| 6 | 395500 |
| 7 | 959944 |
| 8 | 4006901 |
| 9 | 14816006 |
| 10 | 35925302 |
| 11 | 149837853 |
| 12 | 555593556 |
| 13 | 1346798430 |
| 14 | 5611997409 |
| 15 | 20856438080 |
| 16 | 50548611374 |
| 17 | 210462210945 |
| 18 | 783856206336 |
| 19 | 1899488450222 |
| 20 | 7902528627913 |
| 21 | 29493363498624 |
[1469,3286,10885,25882,107651,395500,959944, 4006901,14816006,35925302,149837853,555593556, 1346798430,5611997409,20856438080,50548611374, 210462210945,783856206336,1899488450222, 7902528627913,29493363498624] |