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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 28 |
| 4 | 59 |
| 5 | 146 |
| 6 | 643 |
| 7 | 4004 |
| 8 | 8651 |
| 9 | 12655 |
| 10 | 21306 |
| 11 | 76573 |
| 12 | 97879 |
| 13 | 1838395 |
| 14 | 1936274 |
| 15 | 13456039 |
| 16 | 15392313 |
| 17 | 44240665 |
| 18 | 59632978 |
| 19 | 103873643 |
| 20 | 475127550 |
| 21 | 579001193 |
| 22 | 24793177656 |
| 23 | 149338067129 |
| 24 | 174131244785 |
| 25 | 845863046269 |
| 26 | 1865857337323 |
[1,3,28,59,146,643,4004,8651,12655,21306,76573, 97879,1838395,1936274,13456039,15392313,44240665, 59632978,103873643,475127550,579001193, 24793177656,149338067129,174131244785, 845863046269,1865857337323] |