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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 10 |
| 3 | 19 |
| 4 | 37 |
| 5 | 85 |
| 6 | 142 |
| 7 | 386 |
| 8 | 979 |
| 9 | 1988 |
| 10 | 5128 |
| 11 | 10616 |
| 12 | 25230 |
| 13 | 58238 |
| 14 | 125528 |
| 15 | 302384 |
| 16 | 670325 |
| 17 | 1520808 |
| 18 | 3524961 |
| 19 | 7865967 |
| 20 | 18151793 |
| 21 | 41320633 |
| 22 | 93575521 |
| 23 | 215154289 |
| 24 | 487353355 |
| 25 | 1112746546 |
| 26 | 2542170679 |
| 27 | 5772347607 |
| 28 | 13196888198 |
| 29 | 30049864101 |
[7,10,19,37,85,142,386,979,1988,5128,10616,25230, 58238,125528,302384,670325,1520808,3524961, 7865967,18151793,41320633,93575521,215154289, 487353355,1112746546,2542170679,5772347607, 13196888198,30049864101] |