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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 12 |
| 2 | 50 |
| 3 | 140 |
| 4 | 315 |
| 5 | 616 |
| 6 | 1092 |
| 7 | 1800 |
| 8 | 2805 |
| 9 | 4180 |
| 10 | 6006 |
| 11 | 8372 |
| 12 | 11375 |
| 13 | 15120 |
| 14 | 19720 |
| 15 | 25296 |
| 16 | 31977 |
| 17 | 39900 |
| 18 | 49210 |
| 19 | 60060 |
| 20 | 72611 |
| 21 | 87032 |
| 22 | 103500 |
| 23 | 122200 |
| 24 | 143325 |
| 25 | 167076 |
| 26 | 193662 |
| 27 | 223300 |
| 28 | 256215 |
| 29 | 292640 |
| 30 | 332816 |
| 31 | 376992 |
| 32 | 425425 |
| 33 | 478380 |
| 34 | 536130 |
[1,12,50,140,315,616,1092,1800,2805,4180,6006, 8372,11375,15120,19720,25296,31977,39900,49210, 60060,72611,87032,103500,122200,143325,167076, 193662,223300,256215,292640,332816,376992,425425, 478380,536130] |