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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 30 |
| 3 | 114 |
| 4 | 252 |
| 5 | 444 |
| 6 | 690 |
| 7 | 990 |
| 8 | 1344 |
| 9 | 1752 |
| 10 | 2214 |
| 11 | 2730 |
| 12 | 3300 |
| 13 | 3924 |
| 14 | 4602 |
| 15 | 5334 |
| 16 | 6120 |
| 17 | 6960 |
| 18 | 7854 |
| 19 | 8802 |
| 20 | 9804 |
| 21 | 10860 |
| 22 | 11970 |
| 23 | 13134 |
| 24 | 14352 |
| 25 | 15624 |
| 26 | 16950 |
| 27 | 18330 |
| 28 | 19764 |
| 29 | 21252 |
| 30 | 22794 |
| 31 | 24390 |
| 32 | 26040 |
| 33 | 27744 |
| 34 | 29502 |
| 35 | 31314 |
| 36 | 33180 |
| 37 | 35100 |
| 38 | 37074 |
| 39 | 39102 |
| 40 | 41184 |
| 41 | 43320 |
| 42 | 45510 |
| 43 | 47754 |
| 44 | 50052 |
| 45 | 52404 |
[0,30,114,252,444,690,990,1344,1752,2214,2730, 3300,3924,4602,5334,6120,6960,7854,8802,9804, 10860,11970,13134,14352,15624,16950,18330,19764, 21252,22794,24390,26040,27744,29502,31314,33180, 35100,37074,39102,41184,43320,45510,47754,50052, 52404] |