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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 5 |
| 3 | 55 |
| 4 | 953 |
| 5 | 22651 |
| 6 | 685525 |
| 7 | 25222359 |
| 8 | 1093148145 |
| 9 | 54549313651 |
| 10 | 3080446982221 |
| 11 | 194213549023407 |
| 12 | 13522789698386281 |
| 13 | 1030619149263349387 |
| 14 | 85336828127587240261 |
| 15 | 7628421633465044832391 |
| 16 | 732208108150442899232737 |
| 17 | 75108533335473988089786147 |
[0,1,5,55,953,22651,685525,25222359,1093148145, 54549313651,3080446982221,194213549023407, 13522789698386281,1030619149263349387, 85336828127587240261,7628421633465044832391, 732208108150442899232737, 75108533335473988089786147] |