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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 13 |
| 2 | 55 |
| 3 | 155 |
| 4 | 350 |
| 5 | 686 |
| 6 | 1218 |
| 7 | 2010 |
| 8 | 3135 |
| 9 | 4675 |
| 10 | 6721 |
| 11 | 9373 |
| 12 | 12740 |
| 13 | 16940 |
| 14 | 22100 |
| 15 | 28356 |
| 16 | 35853 |
| 17 | 44745 |
| 18 | 55195 |
| 19 | 67375 |
| 20 | 81466 |
| 21 | 97658 |
| 22 | 116150 |
| 23 | 137150 |
| 24 | 160875 |
| 25 | 187551 |
| 26 | 217413 |
| 27 | 250705 |
| 28 | 287680 |
| 29 | 328600 |
| 30 | 373736 |
| 31 | 423368 |
| 32 | 477785 |
| 33 | 537285 |
[1,13,55,155,350,686,1218,2010,3135,4675,6721, 9373,12740,16940,22100,28356,35853,44745,55195, 67375,81466,97658,116150,137150,160875,187551, 217413,250705,287680,328600,373736,423368,477785, 537285] |