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| n | a(n) |
|---|---|
| 0 | 19 |
| 1 | 20 |
| 2 | 259 |
| 3 | 797 |
| 4 | 3447 |
| 5 | 31820 |
| 6 | 35267 |
| 7 | 102354 |
| 8 | 137621 |
| 9 | 377596 |
| 10 | 515217 |
| 11 | 892813 |
| 12 | 2300843 |
| 13 | 3193656 |
| 14 | 8688155 |
| 15 | 11881811 |
| 16 | 115624454 |
| 17 | 474379627 |
| 18 | 1538763335 |
| 19 | 18939539647 |
| 20 | 20478302982 |
| 21 | 797115052963 |
| 22 | 817593355945 |
[19,20,259,797,3447,31820,35267,102354,137621, 377596,515217,892813,2300843,3193656,8688155, 11881811,115624454,474379627,1538763335, 18939539647,20478302982,797115052963,817593355945] |