| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 10 |
| 3 | 36 |
| 4 | 155 |
| 5 | 825 |
| 6 | 5227 |
| 7 | 36930 |
| 8 | 277933 |
| 9 | 2181186 |
| 10 | 17716100 |
| 11 | 148600698 |
| 12 | 1286066999 |
| 13 | 11471959881 |
| 14 | 105320978028 |
| 15 | 993555579651 |
| 16 | 9616293352921 |
| 17 | 95370420276468 |
| 18 | 968267603845781 |
| 19 | 10056629892262203 |
| 20 | 106798045980208919 |
| 21 | 1159174549401667188 |
| 22 | 12854190552592134081 |
| 23 | 145574358625296958326 |
| 24 | 1683040220764208777635 |
[1,3,10,36,155,825,5227,36930,277933,2181186, 17716100,148600698,1286066999,11471959881, 105320978028,993555579651,9616293352921, 95370420276468,968267603845781,10056629892262203, 106798045980208919,1159174549401667188, 12854190552592134081,145574358625296958326, 1683040220764208777635] |