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| n | a(n) |
|---|---|
| 8 | 1 |
| 9 | 15 |
| 10 | 99 |
| 11 | 429 |
| 12 | 1430 |
| 13 | 3978 |
| 14 | 9690 |
| 15 | 21318 |
| 16 | 43263 |
| 17 | 82225 |
| 18 | 148005 |
| 19 | 254475 |
| 20 | 420732 |
| 21 | 672452 |
| 22 | 1043460 |
| 23 | 1577532 |
| 24 | 2330445 |
| 25 | 3372291 |
| 26 | 4790071 |
| 27 | 6690585 |
| 28 | 9203634 |
| 29 | 12485550 |
| 30 | 16723070 |
| 31 | 22137570 |
| 32 | 28989675 |
| 33 | 37584261 |
| 34 | 48275865 |
| 35 | 61474519 |
[1,15,99,429,1430,3978,9690,21318,43263,82225, 148005,254475,420732,672452,1043460,1577532, 2330445,3372291,4790071,6690585,9203634,12485550, 16723070,22137570,28989675,37584261,48275865, 61474519] |