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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 42 |
| 3 | 1900 |
| 4 | 184550 |
| 5 | 29724388 |
| 6 | 7137090958 |
| 7 | 2393644524156 |
| 8 | 1068870144819960 |
| 9 | 613045196870306340 |
| 10 | 439190550399403297437 |
| 11 | 384354189217232125992320 |
| 12 | 403475262029493557613389128 |
| 13 | 500401167055816780694578266750 |
| 14 | 723870101627745660876118985228250 |
[1,3,42,1900,184550,29724388,7137090958, 2393644524156,1068870144819960,613045196870306340, 439190550399403297437,384354189217232125992320, 403475262029493557613389128, 500401167055816780694578266750, 723870101627745660876118985228250] |