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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 2 |
| 3 | 5 |
| 4 | 307 |
| 5 | 807 |
| 6 | 72943 |
| 7 | 795807 |
| 8 | 1295807 |
| 9 | 16295807 |
| 10 | 166295807 |
| 11 | 16666295807 |
| 12 | 31666295807 |
| 13 | 81666295807 |
| 14 | 8581666295807 |
| 15 | 26581907922943 |
| 16 | 503581666295807 |
| 17 | 2003581666295807 |
| 18 | 90476581907922943 |
| 19 | 140476581907922943 |
| 20 | 6847003581666295807 |
| 21 | 61847003581666295807 |
| 22 | 911847003581666295807 |
[2,2,5,307,807,72943,795807,1295807,16295807, 166295807,16666295807,31666295807,81666295807, 8581666295807,26581907922943,503581666295807, 2003581666295807,90476581907922943, 140476581907922943,6847003581666295807, 61847003581666295807,911847003581666295807] |