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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 650 |
| 2 | 105950 |
| 3 | 7746050 |
| 4 | 323371100 |
| 5 | 8818775030 |
| 6 | 171332460650 |
| 7 | 2520031983950 |
| 8 | 29356499303300 |
| 9 | 280442899885850 |
| 10 | 2258408187518990 |
| 11 | 15677116400829650 |
| 12 | 95542687574917700 |
| 13 | 519065738821138550 |
| 14 | 2546320423186207850 |
[1,650,105950,7746050,323371100,8818775030, 171332460650,2520031983950,29356499303300, 280442899885850,2258408187518990, 15677116400829650,95542687574917700, 519065738821138550,2546320423186207850] |