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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 14 |
| 2 | 90 |
| 3 | 360 |
| 4 | 1075 |
| 5 | 2646 |
| 6 | 5684 |
| 7 | 11040 |
| 8 | 19845 |
| 9 | 33550 |
| 10 | 53966 |
| 11 | 83304 |
| 12 | 124215 |
| 13 | 179830 |
| 14 | 253800 |
| 15 | 350336 |
| 16 | 474249 |
| 17 | 630990 |
| 18 | 826690 |
| 19 | 1068200 |
| 20 | 1363131 |
| 21 | 1719894 |
| 22 | 2147740 |
| 23 | 2656800 |
| 24 | 3258125 |
| 25 | 3963726 |
| 26 | 4786614 |
| 27 | 5740840 |
| 28 | 6841535 |
| 29 | 8104950 |
[1,14,90,360,1075,2646,5684,11040,19845,33550, 53966,83304,124215,179830,253800,350336,474249, 630990,826690,1068200,1363131,1719894,2147740, 2656800,3258125,3963726,4786614,5740840,6841535, 8104950] |