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| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 9 |
| 4 | 37 |
| 5 | 105 |
| 6 | 241 |
| 7 | 481 |
| 8 | 869 |
| 9 | 1457 |
| 10 | 2305 |
| 11 | 3481 |
| 12 | 5061 |
| 13 | 7129 |
| 14 | 9777 |
| 15 | 13105 |
| 16 | 17221 |
| 17 | 22241 |
| 18 | 28289 |
| 19 | 35497 |
| 20 | 44005 |
| 21 | 53961 |
| 22 | 65521 |
| 23 | 78849 |
| 24 | 94117 |
| 25 | 111505 |
| 26 | 131201 |
| 27 | 153401 |
| 28 | 178309 |
| 29 | 206137 |
| 30 | 237105 |
| 31 | 271441 |
| 32 | 309381 |
| 33 | 351169 |
| 34 | 397057 |
| 35 | 447305 |
| 36 | 502181 |
| 37 | 561961 |
| 38 | 626929 |
[1,9,37,105,241,481,869,1457,2305,3481,5061,7129, 9777,13105,17221,22241,28289,35497,44005,53961, 65521,78849,94117,111505,131201,153401,178309, 206137,237105,271441,309381,351169,397057,447305, 502181,561961,626929] |