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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 26 |
| 3 | 98 |
| 4 | 378 |
| 5 | 1512 |
| 6 | 6018 |
| 7 | 23890 |
| 8 | 94846 |
| 9 | 376670 |
| 10 | 1495888 |
| 11 | 5940530 |
| 12 | 23591238 |
| 13 | 93686602 |
| 14 | 372052590 |
| 15 | 1477512180 |
| 16 | 5867563418 |
| 17 | 23301534646 |
| 18 | 92536114306 |
| 19 | 367483625614 |
| 20 | 1459367686212 |
| 21 | 5795507324598 |
| 22 | 23015382256774 |
| 23 | 91399732715398 |
[6,26,98,378,1512,6018,23890,94846,376670,1495888, 5940530,23591238,93686602,372052590,1477512180, 5867563418,23301534646,92536114306,367483625614, 1459367686212,5795507324598,23015382256774, 91399732715398] |