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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 10 |
| 4 | 20 |
| 5 | 35 |
| 6 | 56 |
| 7 | 84 |
| 8 | 120 |
| 9 | 165 |
| 10 | 219 |
| 11 | 279 |
| 12 | 342 |
| 13 | 405 |
| 14 | 465 |
| 15 | 519 |
| 16 | 564 |
| 17 | 597 |
| 18 | 615 |
| 19 | 615 |
| 20 | 597 |
| 21 | 564 |
| 22 | 519 |
| 23 | 465 |
| 24 | 405 |
| 25 | 342 |
| 26 | 279 |
| 27 | 219 |
| 28 | 165 |
| 29 | 120 |
| 30 | 84 |
| 31 | 56 |
| 32 | 35 |
| 33 | 20 |
| 34 | 10 |
| 35 | 4 |
| 36 | 1 |
[1,4,10,20,35,56,84,120,165,219,279,342,405,465, 519,564,597,615,615,597,564,519,465,405,342,279, 219,165,120,84,56,35,20,10,4,1] |