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| n | a(n) |
|---|---|
| 1 | 12 |
| 2 | 26 |
| 3 | 54 |
| 4 | 106 |
| 5 | 208 |
| 6 | 398 |
| 7 | 766 |
| 8 | 1458 |
| 9 | 2792 |
| 10 | 5324 |
| 11 | 10206 |
| 12 | 19550 |
| 13 | 37616 |
| 14 | 72446 |
| 15 | 140048 |
| 16 | 271194 |
| 17 | 526792 |
| 18 | 1025268 |
| 19 | 2000636 |
| 20 | 3911284 |
| 21 | 7663264 |
| 22 | 15040266 |
| 23 | 29571962 |
| 24 | 58231566 |
| 25 | 114837690 |
| 26 | 226761020 |
| 27 | 448318274 |
| 28 | 887305854 |
| 29 | 1757921506 |
| 30 | 3485905204 |
[12,26,54,106,208,398,766,1458,2792,5324,10206, 19550,37616,72446,140048,271194,526792,1025268, 2000636,3911284,7663264,15040266,29571962, 58231566,114837690,226761020,448318274,887305854, 1757921506,3485905204] |