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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 53 |
| 3 | 419 |
| 4 | 1619 |
| 5 | 4637 |
| 6 | 10627 |
| 7 | 21391 |
| 8 | 38873 |
| 9 | 65687 |
| 10 | 104729 |
| 11 | 159521 |
| 12 | 233879 |
| 13 | 331943 |
| 14 | 459341 |
| 15 | 620201 |
| 16 | 821641 |
| 17 | 1069603 |
| 18 | 1370099 |
| 19 | 1731659 |
| 20 | 2160553 |
| 21 | 2667983 |
| 22 | 3260137 |
| 23 | 3948809 |
| 24 | 4742977 |
| 25 | 5653807 |
| 26 | 6691987 |
| 27 | 7867547 |
| 28 | 9195889 |
| 29 | 10688173 |
| 30 | 12358069 |
[2,53,419,1619,4637,10627,21391,38873,65687, 104729,159521,233879,331943,459341,620201,821641, 1069603,1370099,1731659,2160553,2667983,3260137, 3948809,4742977,5653807,6691987,7867547,9195889, 10688173,12358069] |