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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 113 |
| 3 | 429 |
| 4 | 8974 |
| 5 | 124543 |
| 6 | 1972991 |
| 7 | 31434011 |
| 8 | 501719570 |
| 9 | 8058860856 |
| 10 | 129431706223 |
| 11 | 2079971600986 |
| 12 | 33427271398920 |
| 13 | 537230330075624 |
| 14 | 8634447605659364 |
| 15 | 138773950623180668 |
| 16 | 2230408811079905218 |
[1,113,429,8974,124543,1972991,31434011,501719570, 8058860856,129431706223,2079971600986, 33427271398920,537230330075624,8634447605659364, 138773950623180668,2230408811079905218] |