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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 92252 |
| 3 | 10015005 |
| 4 | 211911256 |
| 5 | 2054455670 |
| 6 | 12565647510 |
| 7 | 56672074888 |
| 8 | 205811431514 |
| 9 | 635627275767 |
| 10 | 1731030733840 |
| 11 | 4263421511271 |
| 12 | 9672347764772 |
| 13 | 20492404684400 |
| 14 | 40975640875026 |
| 15 | 77970286548270 |
| 16 | 142128053955030 |
| 17 | 249524848105533 |
| 18 | 423793107835284 |
| 19 | 698878653009537 |
[0,1,92252,10015005,211911256,2054455670, 12565647510,56672074888,205811431514,635627275767, 1731030733840,4263421511271,9672347764772, 20492404684400,40975640875026,77970286548270, 142128053955030,249524848105533,423793107835284, 698878653009537] |