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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 10 |
| 3 | 46 |
| 4 | 153 |
| 5 | 409 |
| 6 | 923 |
| 7 | 1854 |
| 8 | 3477 |
| 9 | 6034 |
| 10 | 9876 |
| 11 | 15590 |
| 12 | 23625 |
| 13 | 34577 |
| 14 | 49487 |
| 15 | 69002 |
| 16 | 94129 |
| 17 | 126458 |
| 18 | 166848 |
| 19 | 216732 |
| 20 | 278575 |
| 21 | 353347 |
| 22 | 442987 |
| 23 | 550942 |
| 24 | 678467 |
| 25 | 827960 |
| 26 | 1004068 |
| 27 | 1208150 |
| 28 | 1443457 |
| 29 | 1715865 |
| 30 | 2026795 |
| 31 | 2380232 |
| 32 | 2783955 |
| 33 | 3239122 |
| 34 | 3750544 |
[2,10,46,153,409,923,1854,3477,6034,9876,15590, 23625,34577,49487,69002,94129,126458,166848, 216732,278575,353347,442987,550942,678467,827960, 1004068,1208150,1443457,1715865,2026795,2380232, 2783955,3239122,3750544] |