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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 10 |
| 3 | 46 |
| 4 | 140 |
| 5 | 335 |
| 6 | 686 |
| 7 | 1260 |
| 8 | 2136 |
| 9 | 3405 |
| 10 | 5170 |
| 11 | 7546 |
| 12 | 10660 |
| 13 | 14651 |
| 14 | 19670 |
| 15 | 25880 |
| 16 | 33456 |
| 17 | 42585 |
| 18 | 53466 |
| 19 | 66310 |
| 20 | 81340 |
| 21 | 98791 |
| 22 | 118910 |
| 23 | 141956 |
| 24 | 168200 |
| 25 | 197925 |
| 26 | 231426 |
| 27 | 269010 |
| 28 | 310996 |
| 29 | 357715 |
| 30 | 409510 |
| 31 | 466736 |
[1,10,46,140,335,686,1260,2136,3405,5170,7546, 10660,14651,19670,25880,33456,42585,53466,66310, 81340,98791,118910,141956,168200,197925,231426, 269010,310996,357715,409510,466736] |