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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 9 |
| 3 | 25 |
| 4 | 61 |
| 5 | 132 |
| 6 | 259 |
| 7 | 470 |
| 8 | 801 |
| 9 | 1297 |
| 10 | 2013 |
| 11 | 3015 |
| 12 | 4381 |
| 13 | 6202 |
| 14 | 8583 |
| 15 | 11644 |
| 16 | 15521 |
| 17 | 20367 |
| 18 | 26353 |
| 19 | 33669 |
| 20 | 42525 |
| 21 | 53152 |
| 22 | 65803 |
| 23 | 80754 |
| 24 | 98305 |
| 25 | 118781 |
| 26 | 142533 |
| 27 | 169939 |
| 28 | 201405 |
| 29 | 237366 |
| 30 | 278287 |
| 31 | 324664 |
| 32 | 377025 |
| 33 | 435931 |
| 34 | 501977 |
| 35 | 575793 |
| 36 | 658045 |
| 37 | 749436 |
[1,3,9,25,61,132,259,470,801,1297,2013,3015,4381, 6202,8583,11644,15521,20367,26353,33669,42525, 53152,65803,80754,98305,118781,142533,169939, 201405,237366,278287,324664,377025,435931,501977, 575793,658045,749436] |