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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 45 |
| 3 | 140 |
| 4 | 350 |
| 5 | 756 |
| 6 | 1470 |
| 7 | 2640 |
| 8 | 4455 |
| 9 | 7150 |
| 10 | 11011 |
| 11 | 16380 |
| 12 | 23660 |
| 13 | 33320 |
| 14 | 45900 |
| 15 | 62016 |
| 16 | 82365 |
| 17 | 107730 |
| 18 | 138985 |
| 19 | 177100 |
| 20 | 223146 |
| 21 | 278300 |
| 22 | 343850 |
| 23 | 421200 |
| 24 | 511875 |
| 25 | 617526 |
| 26 | 739935 |
| 27 | 881020 |
| 28 | 1042840 |
| 29 | 1227600 |
| 30 | 1437656 |
| 31 | 1675520 |
| 32 | 1943865 |
| 33 | 2245530 |
| 34 | 2583525 |
[1,10,45,140,350,756,1470,2640,4455,7150,11011, 16380,23660,33320,45900,62016,82365,107730,138985, 177100,223146,278300,343850,421200,511875,617526, 739935,881020,1042840,1227600,1437656,1675520, 1943865,2245530,2583525] |