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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 8 |
| 3 | 20 |
| 4 | 36 |
| 5 | 72 |
| 6 | 114 |
| 7 | 154 |
| 8 | 220 |
| 9 | 282 |
| 10 | 354 |
| 11 | 464 |
| 12 | 540 |
| 13 | 674 |
| 14 | 804 |
| 15 | 906 |
| 16 | 1132 |
| 17 | 1220 |
| 18 | 1442 |
[2,8,20,36,72,114,154,220,282,354,464,540,674,804, 906,1132,1220,1442] |