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| n | a(n) |
|---|---|
| 1 | 15 |
| 2 | 42 |
| 3 | 90 |
| 4 | 126 |
| 5 | 165 |
| 6 | 273 |
| 7 | 612 |
| 8 | 630 |
| 9 | 855 |
| 10 | 1020 |
| 11 | 1404 |
| 12 | 1512 |
| 13 | 1518 |
| 14 | 1950 |
| 15 | 1980 |
| 16 | 2457 |
| 17 | 3045 |
| 18 | 3720 |
| 19 | 5040 |
| 20 | 6327 |
| 21 | 6480 |
| 22 | 7280 |
| 23 | 8184 |
| 24 | 8610 |
| 25 | 9933 |
| 26 | 12972 |
| 27 | 14700 |
| 28 | 15600 |
| 29 | 18603 |
| 30 | 23760 |
| 31 | 25665 |
| 32 | 28365 |
| 33 | 31500 |
| 34 | 37587 |
| 35 | 43890 |
| 36 | 44730 |
[15,42,90,126,165,273,612,630,855,1020,1404,1512, 1518,1950,1980,2457,3045,3720,5040,6327,6480,7280, 8184,8610,9933,12972,14700,15600,18603,23760, 25665,28365,31500,37587,43890,44730] |