The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 50 |
| 2 | 1274 |
| 3 | 22049 |
| 4 | 291499 |
| 5 | 3139085 |
| 6 | 28673475 |
| 7 | 228439966 |
| 8 | 1619966516 |
| 9 | 10384805691 |
| 10 | 60915061181 |
| 11 | 330167238726 |
| 12 | 1666932807305 |
| 13 | 7892136355680 |
| 14 | 35239942525455 |
| 15 | 149127876298179 |
| 16 | 600620896491309 |
| 17 | 2310803893154484 |
[1,50,1274,22049,291499,3139085,28673475, 228439966,1619966516,10384805691,60915061181, 330167238726,1666932807305,7892136355680, 35239942525455,149127876298179,600620896491309, 2310803893154484] |