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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 20 |
| 3 | 84 |
| 4 | 220 |
| 5 | 455 |
| 6 | 816 |
| 7 | 1330 |
| 8 | 2024 |
| 9 | 2925 |
| 10 | 4060 |
| 11 | 5456 |
| 12 | 7140 |
| 13 | 9139 |
| 14 | 11480 |
| 15 | 14190 |
| 16 | 17296 |
| 17 | 20825 |
| 18 | 24804 |
| 19 | 29260 |
| 20 | 34220 |
| 21 | 39711 |
| 22 | 45760 |
| 23 | 52394 |
| 24 | 59640 |
| 25 | 67525 |
| 26 | 76076 |
| 27 | 85320 |
| 28 | 95284 |
| 29 | 105995 |
| 30 | 117480 |
| 31 | 129766 |
| 32 | 142880 |
| 33 | 156849 |
| 34 | 171700 |
| 35 | 187460 |
| 36 | 204156 |
[0,1,20,84,220,455,816,1330,2024,2925,4060,5456, 7140,9139,11480,14190,17296,20825,24804,29260, 34220,39711,45760,52394,59640,67525,76076,85320, 95284,105995,117480,129766,142880,156849,171700, 187460,204156] |