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| n | a(n) |
|---|---|
| 1 | 31 |
| 2 | 714169 |
| 3 | 2516309 |
| 4 | 4483363 |
| 5 | 47127727 |
| 6 | 145996069 |
| 7 | 583363661 |
| 8 | 1028282141 |
| 9 | 1637687383 |
| 10 | 1984271941 |
| 11 | 3680735213 |
| 12 | 4484951059 |
| 13 | 5187593417 |
| 14 | 8601029209 |
| 15 | 19614906869 |
| 16 | 23431992781 |
| 17 | 33458412373 |
| 18 | 40695658637 |
| 19 | 41234578433 |
[31,714169,2516309,4483363,47127727,145996069, 583363661,1028282141,1637687383,1984271941, 3680735213,4484951059,5187593417,8601029209, 19614906869,23431992781,33458412373,40695658637, 41234578433] |