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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 15 |
| 2 | 85 |
| 3 | 295 |
| 4 | 771 |
| 5 | 1681 |
| 6 | 3235 |
| 7 | 5685 |
| 8 | 9325 |
| 9 | 14491 |
| 10 | 21561 |
| 11 | 30955 |
| 12 | 43135 |
| 13 | 58605 |
| 14 | 77911 |
| 15 | 101641 |
| 16 | 130425 |
| 17 | 164935 |
| 18 | 205885 |
| 19 | 254031 |
| 20 | 310171 |
| 21 | 375145 |
| 22 | 449835 |
| 23 | 535165 |
| 24 | 632101 |
| 25 | 741651 |
| 26 | 864865 |
| 27 | 1002835 |
| 28 | 1156695 |
| 29 | 1327621 |
| 30 | 1516831 |
| 31 | 1725585 |
| 32 | 1955185 |
| 33 | 2206975 |
[1,15,85,295,771,1681,3235,5685,9325,14491,21561, 30955,43135,58605,77911,101641,130425,164935, 205885,254031,310171,375145,449835,535165,632101, 741651,864865,1002835,1156695,1327621,1516831, 1725585,1955185,2206975] |