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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 223 |
| 3 | 611 |
| 4 | 2042 |
| 5 | 7353 |
| 6 | 28397 |
| 7 | 112573 |
| 8 | 451977 |
| 9 | 1825793 |
| 10 | 7399711 |
| 11 | 30171808 |
| 12 | 123052105 |
| 13 | 502913614 |
| 14 | 2059649664 |
| 15 | 8452421368 |
| 16 | 34740533882 |
| 17 | 142943151855 |
| 18 | 588556514012 |
| 19 | 2424582989132 |
| 20 | 9992269129124 |
| 21 | 41193493866434 |
| 22 | 169864713001219 |
[8,223,611,2042,7353,28397,112573,451977,1825793, 7399711,30171808,123052105,502913614,2059649664, 8452421368,34740533882,142943151855,588556514012, 2424582989132,9992269129124,41193493866434, 169864713001219] |