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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 123 |
| 3 | 604 |
| 4 | 2045 |
| 5 | 5706 |
| 6 | 13087 |
| 7 | 26948 |
| 8 | 50529 |
| 9 | 88510 |
| 10 | 146351 |
| 11 | 231312 |
| 12 | 351913 |
| 13 | 518234 |
| 14 | 742275 |
| 15 | 1038016 |
| 16 | 1421237 |
| 17 | 1910418 |
| 18 | 2525719 |
| 19 | 3290420 |
| 20 | 4230141 |
| 21 | 5373382 |
| 22 | 6751463 |
| 23 | 8398944 |
| 24 | 10353505 |
| 25 | 12656246 |
| 26 | 15351627 |
| 27 | 18488128 |
| 28 | 22117469 |
| 29 | 26295930 |
| 30 | 31083331 |
[2,123,604,2045,5706,13087,26948,50529,88510, 146351,231312,351913,518234,742275,1038016, 1421237,1910418,2525719,3290420,4230141,5373382, 6751463,8398944,10353505,12656246,15351627, 18488128,22117469,26295930,31083331] |