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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 10 |
| 3 | 62 |
| 4 | 486 |
| 5 | 4482 |
| 6 | 47106 |
| 7 | 553226 |
| 8 | 7152438 |
| 9 | 100644194 |
| 10 | 1527758136 |
| 11 | 24839853326 |
| 12 | 430045385424 |
| 13 | 7888706328934 |
| 14 | 152685931935634 |
| 15 | 3106864307092950 |
| 16 | 66253232332628166 |
| 17 | 1476558925897693698 |
| 18 | 34307420366092350048 |
| 19 | 829217371825336147142 |
[1,2,10,62,486,4482,47106,553226,7152438, 100644194,1527758136,24839853326,430045385424, 7888706328934,152685931935634,3106864307092950, 66253232332628166,1476558925897693698, 34307420366092350048,829217371825336147142] |