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| n | a(n) |
|---|---|
| 5 | 3 |
| 6 | 7 |
| 7 | 18 |
| 8 | 47 |
| 9 | 123 |
| 10 | 319 |
| 11 | 806 |
| 12 | 1954 |
| 13 | 4506 |
| 14 | 9859 |
| 15 | 20495 |
| 16 | 40615 |
| 17 | 77040 |
| 18 | 140455 |
| 19 | 247085 |
| 20 | 420906 |
| 21 | 696509 |
| 22 | 1122751 |
| 23 | 1767344 |
| 24 | 2722551 |
| 25 | 4112177 |
| 26 | 6100063 |
| 27 | 8900312 |
| 28 | 12789498 |
| 29 | 18121132 |
| 30 | 25342683 |
| 31 | 35015477 |
| 32 | 47837823 |
| 33 | 64671742 |
[3,7,18,47,123,319,806,1954,4506,9859,20495,40615, 77040,140455,247085,420906,696509,1122751,1767344, 2722551,4112177,6100063,8900312,12789498,18121132, 25342683,35015477,47837823,64671742] |