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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 28 |
| 3 | 55 |
| 4 | 496 |
| 5 | 666 |
| 6 | 780 |
| 7 | 1540 |
| 8 | 2145 |
| 9 | 6441 |
| 10 | 6903 |
| 11 | 8128 |
| 12 | 15051 |
| 13 | 21736 |
| 14 | 36585 |
| 15 | 44551 |
| 16 | 232903 |
| 17 | 234955 |
| 18 | 644680 |
| 19 | 2258875 |
| 20 | 3186550 |
| 21 | 3462396 |
| 22 | 6211050 |
| 23 | 22174470 |
| 24 | 33550336 |
| 25 | 48437403 |
| 26 | 62591266 |
| 27 | 107538445 |
| 28 | 134898525 |
| 29 | 153554050 |
| 30 | 624157446 |
| 31 | 1309312378 |
| 32 | 1339937028 |
[6,28,55,496,666,780,1540,2145,6441,6903,8128, 15051,21736,36585,44551,232903,234955,644680, 2258875,3186550,3462396,6211050,22174470,33550336, 48437403,62591266,107538445,134898525,153554050, 624157446,1309312378,1339937028] |