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| n | a(n) |
|---|---|
| 1 | 266 |
| 2 | 730 |
| 3 | 2966 |
| 4 | 8292 |
| 5 | 24696 |
| 6 | 85048 |
| 7 | 266156 |
| 8 | 813540 |
| 9 | 2626092 |
| 10 | 8360396 |
| 11 | 26119048 |
| 12 | 82814452 |
| 13 | 263115624 |
| 14 | 829520604 |
| 15 | 2621823280 |
| 16 | 8306855180 |
| 17 | 26259682284 |
| 18 | 83003335876 |
| 19 | 262648203728 |
| 20 | 830734849888 |
| 21 | 2626747254764 |
| 22 | 8308477712268 |
[266,730,2966,8292,24696,85048,266156,813540, 2626092,8360396,26119048,82814452,263115624, 829520604,2621823280,8306855180,26259682284, 83003335876,262648203728,830734849888, 2626747254764,8308477712268] |