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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 7 |
| 4 | 135 |
| 5 | 412 |
| 6 | 547 |
| 7 | 959 |
| 8 | 36989 |
| 9 | 37948 |
| 10 | 74937 |
| 11 | 262759 |
| 12 | 5067358 |
| 13 | 15464833 |
| 14 | 20532191 |
| 15 | 35997024 |
| 16 | 1388419103 |
| 17 | 1424416127 |
| 18 | 2812835230 |
| 19 | 9862921817 |
| 20 | 190208349753 |
| 21 | 580487971076 |
| 22 | 770696320829 |
| 23 | 1351184291905 |
| 24 | 52115699413219 |
| 25 | 53466883705124 |
| 26 | 105582583118343 |
[1,1,2,7,135,412,547,959,36989,37948,74937,262759, 5067358,15464833,20532191,35997024,1388419103, 1424416127,2812835230,9862921817,190208349753, 580487971076,770696320829,1351184291905, 52115699413219,53466883705124,105582583118343] |