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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 253 |
| 2 | 494341 |
| 3 | 1403375905 |
| 4 | 4684608730309 |
| 5 | 17126002734202253 |
| 6 | 66366682204430084569 |
| 7 | 267832273159817887638881 |
| 8 | 1113652383352571992799711941 |
| 9 | 4737943697041408831021629805753 |
| 10 | 20526206833382185439454748049996341 |
[1,253,494341,1403375905,4684608730309, 17126002734202253,66366682204430084569, 267832273159817887638881, 1113652383352571992799711941, 4737943697041408831021629805753, 20526206833382185439454748049996341] |