The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 15 |
| 3 | 15 |
| 4 | 53 |
| 5 | 176 |
| 6 | 53 |
| 7 | 170 |
| 8 | 1533 |
| 9 | 1533 |
| 10 | 170 |
| 11 | 497 |
| 12 | 8824 |
| 13 | 21379 |
| 14 | 8824 |
| 15 | 497 |
| 16 | 1407 |
| 17 | 40038 |
| 18 | 142627 |
| 19 | 142627 |
| 20 | 40038 |
| 21 | 1407 |
| 22 | 3962 |
| 23 | 167910 |
| 24 | 748627 |
| 25 | 1115472 |
| 26 | 748627 |
| 27 | 167910 |
| 28 | 3962 |
| 29 | 10867 |
| 30 | 710895 |
| 31 | 3846906 |
| 32 | 8039420 |
| 33 | 8039420 |
| 34 | 3846906 |
| 35 | 710895 |
| 36 | 10867 |
| 37 | 30956 |
| 38 | 3139374 |
[4,15,15,53,176,53,170,1533,1533,170,497,8824, 21379,8824,497,1407,40038,142627,142627,40038, 1407,3962,167910,748627,1115472,748627,167910, 3962,10867,710895,3846906,8039420,8039420,3846906, 710895,10867,30956,3139374] |